top slot games for iphone: best picks for 2023

The world of mobile gaming has seen a significant surge in the popularity of slot games, especially on platforms like the iPhone. With stunning graphics, engaging gameplay, and the convenience of playing on the go, it’s no wonder that slot games are a favorite among iPhone users. Here are the top slot games for iPhone that you should check out in 2023. 1. Gonzo’s Quest by NetEnt Features: Graphics and Animation: Stunning 3D graphics and animations. Gameplay: Unique “Avalanche” feature where symbols fall into place instead of spinning.

Ad Disclosure

ALLTop Rated By UsersLatestPopular

Updated: -

• Cash King Palace
  new

  

  Royal Wins100% / $1500

  Casino popularity:

  Collecting more data...

  Payment methods

  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 

  Play
  • Wagering: 35 x (b)
  • Withdrawal time: 1 days
  • Minimum deposit to casino: $30
  • Bonus max bet: $5
  • Established: 2024
  • Free Spins: 200

  • 1st Deposit Bonus:100% / $1500 + 200 Free Spins
  • Bonus code: FRUIT22nd Deposit Bonus:100% / $1500 + 75 Free Spins
  • Bonus code: FRUIT33rd Deposit Bonus:75% / $3000 + 75 Free Spins
  • Bonus code: FRUIT44th Deposit Bonus:50% / $4500 + 200 Free Spins

  • Leading selection of slots
  • VISA casino site
  • HD streaming casino games
  • Newly unveiled casino
  • Signup offer now available
  • Mr. Gamble special bonuses

  Get the full details

  

  
  Show more
• Lucky Ace Palace
  

  Luck&Luxury100% / $1500

  Casino popularity:

  Collecting more data...

  Payment methods

  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 

  Play
  • Wagering: 35 x (b)
  • Withdrawal time: 1 days
  • Minimum deposit to casino: $30
  • Bonus max bet: $5
  • Established: 2024
  • Free Spins: 200

  • 1st Deposit Bonus:100% / $1500 + 200 Free Spins
  • Bonus code: FRUIT22nd Deposit Bonus:100% / $1500 + 75 Free Spins
  • Bonus code: FRUIT33rd Deposit Bonus:75% / $3000 + 75 Free Spins
  • Bonus code: FRUIT44th Deposit Bonus:50% / $4500 + 200 Free Spins

  • Leading selection of slots
  • VISA casino site
  • HD streaming casino games
  • Newly unveiled casino
  • Signup offer now available
  • Mr. Gamble special bonuses

  Get the full details

  

  
  Show more
• Starlight Betting Lounge
  

  Celestial Bet100% / $1500

  Casino popularity:

  Collecting more data...

  Payment methods

  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 

  Play
  • Wagering: 35 x (b)
  • Withdrawal time: 1 days
  • Minimum deposit to casino: $30
  • Bonus max bet: $5
  • Established: 2024
  • Free Spins: 200

  • 1st Deposit Bonus:100% / $1500 + 200 Free Spins
  • Bonus code: FRUIT22nd Deposit Bonus:100% / $1500 + 75 Free Spins
  • Bonus code: FRUIT33rd Deposit Bonus:75% / $3000 + 75 Free Spins
  • Bonus code: FRUIT44th Deposit Bonus:50% / $4500 + 200 Free Spins

  • Leading selection of slots
  • VISA casino site
  • HD streaming casino games
  • Newly unveiled casino
  • Signup offer now available
  • Mr. Gamble special bonuses

  Get the full details

  

  
  Show more
• Spin Palace Casino
  

  Win Big Now100% / $1500

  Casino popularity:

  Collecting more data...

  Payment methods

  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 

  Play
  • Wagering: 35 x (b)
  • Withdrawal time: 1 days
  • Minimum deposit to casino: $30
  • Bonus max bet: $5
  • Established: 2024
  • Free Spins: 200

  • 1st Deposit Bonus:100% / $1500 + 200 Free Spins
  • Bonus code: FRUIT22nd Deposit Bonus:100% / $1500 + 75 Free Spins
  • Bonus code: FRUIT33rd Deposit Bonus:75% / $3000 + 75 Free Spins
  • Bonus code: FRUIT44th Deposit Bonus:50% / $4500 + 200 Free Spins

  • Leading selection of slots
  • VISA casino site
  • HD streaming casino games
  • Newly unveiled casino
  • Signup offer now available
  • Mr. Gamble special bonuses

  Get the full details

  

  
  Show more
• Silver Fox Slots
  

  Elegance+Fun100% / $1500

  Casino popularity:

  Collecting more data...

  Payment methods

  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 

  Play
  • Wagering: 35 x (b)
  • Withdrawal time: 1 days
  • Minimum deposit to casino: $30
  • Bonus max bet: $5
  • Established: 2024
  • Free Spins: 200

  • 1st Deposit Bonus:100% / $1500 + 200 Free Spins
  • Bonus code: FRUIT22nd Deposit Bonus:100% / $1500 + 75 Free Spins
  • Bonus code: FRUIT33rd Deposit Bonus:75% / $3000 + 75 Free Spins
  • Bonus code: FRUIT44th Deposit Bonus:50% / $4500 + 200 Free Spins

  • Leading selection of slots
  • VISA casino site
  • HD streaming casino games
  • Newly unveiled casino
  • Signup offer now available
  • Mr. Gamble special bonuses

  Get the full details

  

  
  Show more
• Golden Spin Casino
  

  Luxury Play100% / $1500

  Casino popularity:

  Collecting more data...

  Payment methods

  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 

  Play
  • Wagering: 35 x (b)
  • Withdrawal time: 1 days
  • Minimum deposit to casino: $30
  • Bonus max bet: $5
  • Established: 2024
  • Free Spins: 200

  • 1st Deposit Bonus:100% / $1500 + 200 Free Spins
  • Bonus code: FRUIT22nd Deposit Bonus:100% / $1500 + 75 Free Spins
  • Bonus code: FRUIT33rd Deposit Bonus:75% / $3000 + 75 Free Spins
  • Bonus code: FRUIT44th Deposit Bonus:50% / $4500 + 200 Free Spins

  • Leading selection of slots
  • VISA casino site
  • HD streaming casino games
  • Newly unveiled casino
  • Signup offer now available
  • Mr. Gamble special bonuses

  Get the full details

  

  
  Show more
• Royal Fortune Gaming
  

  Opulence & Thrills100% / $1500

  Casino popularity:

  Collecting more data...

  Payment methods

  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 

  Play
  • Wagering: 35 x (b)
  • Withdrawal time: 1 days
  • Minimum deposit to casino: $30
  • Bonus max bet: $5
  • Established: 2024
  • Free Spins: 200

  • 1st Deposit Bonus:100% / $1500 + 200 Free Spins
  • Bonus code: FRUIT22nd Deposit Bonus:100% / $1500 + 75 Free Spins
  • Bonus code: FRUIT33rd Deposit Bonus:75% / $3000 + 75 Free Spins
  • Bonus code: FRUIT44th Deposit Bonus:50% / $4500 + 200 Free Spins

  • Leading selection of slots
  • VISA casino site
  • HD streaming casino games
  • Newly unveiled casino
  • Signup offer now available
  • Mr. Gamble special bonuses

  Get the full details

  

  
  Show more
• Lucky Ace Casino
  

  Luck&Luxury100% / $1500

  Casino popularity:

  Collecting more data...

  Payment methods

  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 

  Play
  • Wagering: 35 x (b)
  • Withdrawal time: 1 days
  • Minimum deposit to casino: $30
  • Bonus max bet: $5
  • Established: 2024
  • Free Spins: 200

  • 1st Deposit Bonus:100% / $1500 + 200 Free Spins
  • Bonus code: FRUIT22nd Deposit Bonus:100% / $1500 + 75 Free Spins
  • Bonus code: FRUIT33rd Deposit Bonus:75% / $3000 + 75 Free Spins
  • Bonus code: FRUIT44th Deposit Bonus:50% / $4500 + 200 Free Spins

  • Leading selection of slots
  • VISA casino site
  • HD streaming casino games
  • Newly unveiled casino
  • Signup offer now available
  • Mr. Gamble special bonuses

  Get the full details

  

  
  Show more
• Diamond Crown Casino
  

  Opulence & Fun100% / $1500

  Casino popularity:

  Collecting more data...

  Payment methods

  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 

  Play
  • Wagering: 35 x (b)
  • Withdrawal time: 1 days
  • Minimum deposit to casino: $30
  • Bonus max bet: $5
  • Established: 2024
  • Free Spins: 200

  • 1st Deposit Bonus:100% / $1500 + 200 Free Spins
  • Bonus code: FRUIT22nd Deposit Bonus:100% / $1500 + 75 Free Spins
  • Bonus code: FRUIT33rd Deposit Bonus:75% / $3000 + 75 Free Spins
  • Bonus code: FRUIT44th Deposit Bonus:50% / $4500 + 200 Free Spins

  • Leading selection of slots
  • VISA casino site
  • HD streaming casino games
  • Newly unveiled casino
  • Signup offer now available
  • Mr. Gamble special bonuses

  Get the full details

  

  
  Show more
• Victory Slots Resort
  

  Spin to Win100% / $1500

  Casino popularity:

  Collecting more data...

  Payment methods

  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 

  Play
  • Wagering: 35 x (b)
  • Withdrawal time: 1 days
  • Minimum deposit to casino: $30
  • Bonus max bet: $5
  • Established: 2024
  • Free Spins: 200

  • 1st Deposit Bonus:100% / $1500 + 200 Free Spins
  • Bonus code: FRUIT22nd Deposit Bonus:100% / $1500 + 75 Free Spins
  • Bonus code: FRUIT33rd Deposit Bonus:75% / $3000 + 75 Free Spins
  • Bonus code: FRUIT44th Deposit Bonus:50% / $4500 + 200 Free Spins

  • Leading selection of slots
  • VISA casino site
  • HD streaming casino games
  • Newly unveiled casino
  • Signup offer now available
  • Mr. Gamble special bonuses

  Get the full details

  

  
  Show more

Source

1. top online pub pokies: best games & bonuses for 2023
2. best online pokies in nz: top-rated games for 2023
3. **discover the top online casinos for 2023: best bonuses, games, and security**
4. top online horse betting sites: expert reviews & best picks for 2023
5. top canadian online casinos for 2023: best bonuses & games
6. **discover the top online casinos for 2023: best bonuses, games, and security**

top slot games for iphone: best picks for 2023

The world of mobile gaming has seen a significant surge in the popularity of slot games, especially on platforms like the iPhone. With stunning graphics, engaging gameplay, and the convenience of playing on the go, it’s no wonder that slot games are a favorite among iPhone users. Here are the top slot games for iPhone that you should check out in 2023.

1. Gonzo’s Quest by NetEnt

Features:

• Graphics and Animation: Stunning 3D graphics and animations.
• Gameplay: Unique “Avalanche” feature where symbols fall into place instead of spinning.
• Bonus Rounds: Free Fall feature with multipliers up to 15x.

Why It’s a Top Pick:

Gonzo’s Quest offers a unique and visually appealing experience that stands out in the crowded slot game market. The Avalanche feature keeps the gameplay fresh and exciting, making it a must-try for any iPhone user.

2. Starburst by NetEnt

Features:

• Graphics: Vibrant and colorful with a space theme.
• Gameplay: Simple yet addictive with expanding wilds.
• RTP: High return to player (RTP) rate of 96.1%.

Why It’s a Top Pick:

Starburst is a classic that has stood the test of time. Its simplicity and high RTP make it a favorite among both casual and seasoned players. The expanding wilds add an extra layer of excitement, ensuring that every spin is a thrill.

3. Book of Dead by Play’n GO

Features:

• Theme: Ancient Egyptian with rich graphics.
• Gameplay: High volatility with a chance for big wins.
• Bonus Rounds: Free spins with expanding symbols.

Why It’s a Top Pick:

Book of Dead is known for its high volatility, which means big wins are possible. The free spins feature with expanding symbols adds an extra layer of excitement, making it a top choice for those looking for a thrilling slot experience.

4. Bonanza by Big Time Gaming

Features:

• Graphics: Mining theme with detailed visuals.
• Gameplay: Megaways engine with up to 117,649 ways to win.
• Bonus Rounds: Free spins with unlimited multipliers.

Why It’s a Top Pick:

Bonanza’s Megaways engine offers an unprecedented number of ways to win, making every spin a potential big win. The free spins feature with unlimited multipliers can lead to massive payouts, ensuring that this game is a favorite among high rollers.

5. Jammin’ Jars by Push Gaming

Features:

• Graphics: Colorful and vibrant with a fruit theme.
• Gameplay: Cluster pays system with cascading reels.
• Bonus Rounds: Free spins with increasing multipliers.

Why It’s a Top Pick:

Jammin’ Jars offers a unique cluster pays system that keeps the gameplay fresh and exciting. The cascading reels and increasing multipliers during free spins make it a top choice for those looking for a dynamic and engaging slot experience.

6. Dead or Alive 2 by NetEnt

Features:

• Theme: Wild West with gritty graphics.
• Gameplay: High volatility with a chance for massive wins.
• Bonus Rounds: Three different free spins features.

Why It’s a Top Pick:

Dead or Alive 2 is a sequel that lives up to its predecessor’s reputation. The high volatility and multiple free spins features offer the potential for huge wins, making it a favorite among thrill-seekers.

Whether you’re a fan of classic slots or prefer more modern, feature-rich games, the iPhone offers a wide variety of slot games to suit every taste. The games listed above are some of the best picks for 2023, offering engaging gameplay, stunning graphics, and the potential for big wins. So, grab your iPhone and start spinning!

free iphone slot games: top picks for 2023

The world of mobile gaming has seen a significant surge in the popularity of slot games, especially on iOS devices like the iPhone. With the advancement in technology, these games have become more immersive, visually stunning, and engaging. If you’re an iPhone user looking for the best free slot games to play in 2023, you’re in the right place. Here are our top picks:

1. Slotomania

Overview

Slotomania is one of the most popular free slot games available on the App Store. It offers a vast collection of slot machines, each with unique themes and features.

Features

• Daily Challenges: Earn rewards by completing daily tasks.
• Social Features: Connect with friends and compete on leaderboards.
• Regular Updates: New games and features are added regularly.

2. DoubleDown Casino

Overview

DoubleDown Casino is a well-known name in the world of free slot games. It offers a variety of slot machines, from classic three-reel games to modern video slots.

Features

• Wide Variety: Choose from over 100 slot games.
• Daily Bonuses: Collect free chips every day.
• Exclusive Games: Access unique games not found elsewhere.

3. GSN Grand Casino

Overview

GSN Grand Casino offers a mix of classic and modern slot games, making it a favorite among casual and hardcore gamers alike.

Features

• Multiple Game Types: Includes slots, bingo, and video poker.
• Daily Tournaments: Compete in daily tournaments for extra rewards.
• User-Friendly Interface: Easy to navigate and play.

4. House of Fun

Overview

House of Fun is a horror-themed slot game that offers a unique and thrilling experience. The game features stunning graphics and immersive sound effects.

Features

• 3D Graphics: High-quality 3D graphics for an engaging experience.
• Story Mode: Follow a storyline as you play through different levels.
• Free Spins: Earn free spins and bonuses regularly.

5. Big Fish Casino

Overview

Big Fish Casino is a comprehensive gaming app that offers not only slot games but also poker, blackjack, and other casino games.

Features

• Diverse Game Selection: Play slots, poker, blackjack, and more.
• Live Multiplayer: Compete with players from around the world.
• Daily Challenges: Complete challenges to earn extra chips.

6. Jackpot Party Casino

Overview

Jackpot Party Casino is known for its vibrant and colorful slot games. It offers a wide range of themes and features to keep players entertained.

Features

• Popular Themes: Games based on popular movies, TV shows, and more.
• Daily Bonuses: Collect free coins daily.
• Regular Updates: New games and features are added frequently.

7. MyVegas Slots

Overview

MyVegas Slots offers a unique twist by allowing players to earn real-world rewards from Las Vegas casinos.

Features

• Real-World Rewards: Earn points that can be redeemed for hotel stays, meals, and more.
• Variety of Games: Choose from a wide range of slot games.
• Social Features: Connect with friends and share rewards.

Whether you’re a casual gamer or a slot enthusiast, these free iPhone slot games offer something for everyone. With stunning graphics, engaging gameplay, and regular updates, you’ll never run out of new experiences. Download these top picks and start spinning those reels today!

top slot games for iphone: best picks for 2023

The world of mobile gaming has seen a significant surge in the popularity of slot games, and the iPhone is at the forefront of this trend. With stunning graphics, immersive soundtracks, and innovative features, these games offer an unparalleled gaming experience. Here are the top slot games for iPhone that you should check out in 2023.

1. Gonzo’s Quest by NetEnt

• Graphics and Sound: Gonzo’s Quest boasts stunning 3D graphics and an engaging soundtrack that transports players to the jungles of South America.
• Gameplay: The game features the innovative Avalanche feature, where symbols fall into place instead of spinning, and winning combinations trigger additional avalanches for more chances to win.
• Special Features: Includes free fall spins with multipliers and a unique bonus game where players help Gonzo find the lost city of gold.

2. Starburst by NetEnt

• Graphics and Sound: Starburst offers vibrant, neon-colored graphics and a catchy, upbeat soundtrack that makes it a favorite among players.
• Gameplay: The game features a simple yet addictive gameplay with expanding wilds that can cover entire reels, offering multiple opportunities to win.
• Special Features: Includes re-spins with expanding wilds and a high RTP (Return to Player) rate, making it a popular choice for both casual and serious players.

3. Book of Dead by Play’n GO

• Graphics and Sound: Book of Dead features rich, detailed graphics and an atmospheric soundtrack that immerses players in the world of ancient Egypt.
• Gameplay: The game offers a classic 5-reel, 10-payline setup with a high volatility that can lead to substantial wins.
• Special Features: Includes free spins with expanding symbols and a bonus game where players can uncover hidden treasures.

4. Bonanza by Big Time Gaming

• Graphics and Sound: Bonanza offers a unique, mining-themed design with vibrant graphics and an energetic soundtrack.
• Gameplay: The game features an innovative Megaways mechanic, where the number of symbols on each reel changes with every spin, offering up to 117,649 ways to win.
• Special Features: Includes cascading reels, multipliers, and a free spins feature with increasing multipliers.

5. Jammin’ Jars by Push Gaming

• Graphics and Sound: Jammin’ Jars features colorful, fruit-themed graphics and a lively, upbeat soundtrack that adds to the fun.
• Gameplay: The game offers a unique cluster pays mechanic, where winning combinations are formed by clusters of symbols instead of traditional paylines.
• Special Features: Includes cascading reels, multipliers, and a high RTP rate, making it a popular choice for players looking for big wins.

6. Dead or Alive 2 by NetEnt

• Graphics and Sound: Dead or Alive 2 offers a gritty, Wild West-themed design with detailed graphics and an atmospheric soundtrack.
• Gameplay: The game features a high volatility with 9 paylines, offering the potential for substantial wins.
• Special Features: Includes free spins with sticky wilds and multipliers, as well as three different bonus games with varying levels of volatility.

7. Reactoonz by Play’n GO

• Graphics and Sound: Reactoonz offers a quirky, alien-themed design with vibrant graphics and a playful soundtrack.
• Gameplay: The game features a unique cluster pays mechanic, where winning combinations are formed by clusters of symbols.
• Special Features: Includes cascading reels, multipliers, and a Gargantoon feature that can trigger massive wins.

8. Immortal Romance by Microgaming

• Graphics and Sound: Immortal Romance offers a dark, gothic-themed design with detailed graphics and an atmospheric soundtrack.
• Gameplay: The game features a 5-reel, 243-ways-to-win setup with a high RTP rate.
• Special Features: Includes free spins with multipliers, as well as a unique Chamber of Spins feature that unlocks different bonus games.

9. Wolf Gold by Pragmatic Play

• Graphics and Sound: Wolf Gold offers a stunning, wildlife-themed design with detailed graphics and an immersive soundtrack.
• Gameplay: The game features a 5-reel, 25-payline setup with a medium volatility.
• Special Features: Includes free spins with stacked wilds, multipliers, and a Money Respin feature that can lead to massive wins.

10. Mega Moolah by Microgaming

• Graphics and Sound: Mega Moolah offers a vibrant, safari-themed design with detailed graphics and an upbeat soundtrack.
• Gameplay: The game features a 5-reel, 25-payline setup with a progressive jackpot that can offer life-changing wins.
• Special Features: Includes free spins with multipliers and a unique jackpot wheel feature that can award one of four progressive jackpots.

These top slot games for iPhone offer a diverse range of themes, gameplay mechanics, and special features, ensuring that there’s something for every type of player. Whether you’re looking for high volatility, innovative mechanics, or the chance to win big, these games are sure to provide an exciting and rewarding gaming experience.

optimized title: best slot machine apps to win real money | top picks for 2023

In the ever-evolving world of online entertainment, slot machine apps have become a popular choice for those looking to win real money. With the rise of mobile technology, these apps offer a convenient and exciting way to enjoy casino-style gaming on the go. Here are the top picks for 2023 that you should consider if you’re looking to spin the reels and potentially hit the jackpot.

1. Big Fish Casino

Overview

Big Fish Casino is one of the most popular slot machine apps available, offering a wide variety of games including slots, poker, and blackjack. The app is known for its high-quality graphics and smooth gameplay.

Key Features

• Diverse Game Selection: Offers a variety of slot machines with different themes and gameplay styles.
• Daily Challenges: Engage in daily challenges to earn rewards and bonuses.
• Social Interaction: Play with friends or join a club to enhance your gaming experience.

Why Choose Big Fish Casino?

• User-Friendly Interface: Easy to navigate and play.
• Regular Updates: Constantly updated with new games and features.

2. Slotomania

Overview

Slotomania is a fan-favorite slot machine app that has been around for years. It offers a massive collection of slot games with various themes and bonus features.

Key Features

• Vast Game Library: Access to over 200 slot games.
• Daily Bonuses: Receive daily bonuses to keep your gameplay exciting.
• Tournaments: Participate in tournaments to compete with other players and win big.

Why Choose Slotomania?

• Loyalty Program: Earn rewards and climb the loyalty tiers for exclusive benefits.
• Regular Promotions: Enjoy frequent promotions and special offers.

3. DoubleDown Casino

Overview

DoubleDown Casino is another top-rated slot machine app that offers a wide range of games, including classic slots and modern video slots.

Key Features

• Classic and Modern Slots: A mix of traditional and modern slot games.
• Free Chips: Receive free chips daily to keep playing.
• Interactive Features: Engage with interactive features like mini-games and bonus rounds.

Why Choose DoubleDown Casino?

• High Payout Rates: Known for its high payout rates, making it a favorite among players.
• Community Features: Join a community of players and share experiences.

4. GSN Grand Casino

Overview

GSN Grand Casino offers a variety of slot games and other casino games like bingo and video poker. It’s a great option for those who enjoy a mix of gaming experiences.

Key Features

• Diverse Game Selection: Includes slots, bingo, and video poker.
• Daily Challenges: Complete daily challenges to earn extra rewards.
• Progressive Jackpots: Play for the chance to win progressive jackpots.

Why Choose GSN Grand Casino?

• Balanced Gameplay: Offers a balanced mix of casual and competitive gameplay.
• Regular Updates: Keeps the game library fresh with new additions.

5. House of Fun

Overview

House of Fun is a popular slot machine app known for its horror-themed slots and engaging gameplay. It offers a unique and thrilling experience for slot enthusiasts.

Key Features

• Unique Themes: Horror-themed slots with immersive graphics and sound effects.
• Free Spins: Earn free spins through various in-game activities.
• Daily Bonuses: Receive daily bonuses to extend your gameplay.

Why Choose House of Fun?

• Unique Experience: Offers a different and exciting gaming experience compared to other apps.
• Regular Events: Participate in regular events and challenges for extra rewards.

Choosing the best slot machine app to win real money depends on your personal preferences and gaming style. Whether you prefer a diverse game selection, unique themes, or high payout rates, there’s an app on this list that’s sure to meet your needs. Download one (or more) of these top picks for 2023 and start spinning your way to potential winnings today!

Frequently Questions