Slither.io review

Slither.io is the purest .io game here. The site sums it up as the most famous slither game in the world, played against people around the globe for the title of longest snake of the day. Lowtech Studios' App Store listing explains the core rule: if your head touches another player you explode, but if they run into you, you eat their remains, so even a tiny snake can beat a giant one by cutting in front of it. The browser version is free with no account, and whoever is longest gets to write a victory message that every other player sees. The iPhone and iPad app is free with one purchase listed, Remove Ads for $3.99 on the US App Store. Slither.io scores lower on capabilities because there are few modes or unlocks, and the app's 3.8 rating from 3.4K ratings includes complaints about lag. For pick-up-and-play value it is hard to beat. We compared documented features and published prices.

Who it is for

Anyone who wants a one-button game they can play for two minutes or two hours.

Price

Free in the browser; the iPhone app sells Remove Ads for $3.99 on the US App Store.

Remove Ads $3.99
Quoted from the vendor pricing page on November 10, 2026.

Key features

• Grow by eating pellets and the remains of other players
• Small players can win by cutting in front of bigger ones
• Daily leaderboard for the longest slither
• Victory message shown to all players when you take first place
• App for iPhone and iPad in 25 languages

Strengths and weaknesses

• Strength: Very easy to learn, with almost no controls to master
• Strength: Free in the browser with no account
• Strength: One-time $3.99 purchase removes ads in the app
• Weakness: Few modes or progression systems
• Weakness: The iPhone app rates 3.8 from 3.4K ratings, with lag complaints in reviews
• Weakness: Ads appear in the free version

Key facts

• Price: Free in the browser
• Remove Ads: $3.99 on the US App Store
• Developer: Lowtech Studios LLC
• App Store rating: 3.8 from 3.4K ratings
• Age rating: 4+

Where it ranks

Slither.io is No. 3 in our Best .io Games verdict.