# iO - A Physics Platformer — Funny Physics Games > Physics platformer with size, speed, and momentum puzzles. (iPhone/iPad app by Gamious B.V..) - Source: https://appshunter.io/ios/app/io-a-physics-platformer/id960831187 (this page in markdown: same URL + `.md`) - Developer: [Gamious B.V.](https://appshunter.io/developer/539181337) - Category: Games, Entertainment, Casual, Strategy - Price: Free with in-app purchases - Rating: 3.74/5 from 19 App Store ratings · 76 written reviews indexed - Age rating: 4+ - Requires: iOS 11.0 · 466 MB - Languages: English, Chinese, Chinese - Released: 2015-02-18 - Data updated: 2026-06-09 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/io-a-physics-platformer/id960831187/reviews.md ## What is iO? ** Global Game Jam 2012 Winner ** ** IndieCade Festival 2014 Finalist ** ** GDC Best In Play 2015 - Honorable Mention ** TouchArcade: 4 out of 5 - "For those who enjoy playing with balls, iO has plenty to show you." AppleNApps: 4 out of 5 - "iO is a finely crafted platformer that keeps things fresh making it well worth picking up." Gamezebo: 4 out of 5 - "It's packed with unique style and mechanics that give it an edge over similar titles." iO - A Physics Platformer A physics platformer about size, speed and momentum unlike anything you’ve ever seen before! Grow, shrink, roll, leap and climb in this unique puzzler featuring over 225 challenging mazes one-of-a-kind gameplay that includes portals, inverted gravity, vehicles and more! Share your times with friends on the global leaderboards and become a time/space legend! FEATURES - Play with size, weight and mass to reach the exit as fast as possible! - Over 225 puzzles to solve and more coming in future updates. - Intuitive touch controls. - Make new friends and compete against old ones on the Global Leaderboards. - Unlock new achievements. - Unique and wide variety of gameplay mechanics including gravity manipulation, portals, vehicles and more! - Retro-futuristic visuals. ## Key features - Size, weight, and mass manipulation - Over 225 challenging mazes - Portals and inverted gravity - Global leaderboards - Unlockable achievements - Intuitive touch controls ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Remove all advertisements | $0.99 | one-time | ## Recent user reviews (10 of 76) All indexed reviews: https://appshunter.io/ios/app/io-a-physics-platformer/id960831187/reviews.md ### 2/5 — Developer abandoned? *2024-05-08, version 5.5.2* The most “helpful” reviews are 8-9yrs old. I guess that was my first tip. Controls are a bit funky, and apparently not formatted for mobile (buttons cut off at screen edges). No audio, music or sound fx. Overall unpolished, but perhaps pretty good by 2015 standards I suppose. Anyway I was getting by, played about 10 levels with no ads and all seemed well. Last level I completed the said “watch ad to unlocked next 3 levels.” Well, every 3 levels isn’t so bad. Buuuuut… pressing watch ad did nothing. So can’t progress, put in the odd position of wishing an ad would play. Judging by the activity, or lack thereof, this probably won’t be addressed or fixed anytime soon. Oh well, promising game for what it’s worth. ### 1/5 — Most levels permenantly locked *2024-04-15, version 5.5.2* Game says i have to watch an ad to unlock the next levels, but it won't give me the ad! Ive tried numerous times but i can't unlock the level. I was really looking forward to them ### 2/5 — Too many ads *2019-10-28, version 5.5.2* Fun game, but the ads are ridiculous. And when I tried to disable them they took my payment but continued to show ads. ### 1/5 — WAY to many ads *2019-08-25, version 5.5.2* Fun game but way to many adds and many of them were in Japanese and screamed. Deleted it. ### 1/5 — Werbung *2019-07-24, version 5.5.2* Obwohl ich „keine Werbung“ gekauft und bezahlt habe, wird weiter Werbung angezeigt. Das muss behoben werden - eigentlich tolles Spiel. Aber nach einem Update weniger Funktionen zu haben und nach Bezahlung keine Besserung, macht aus einem langjährigen, zufriedenen Benutzer einen unzufriedenen. ### 1/5 — Pubs pubs et pubs *2019-07-02, version 5.5.2* En fait tu joues mais y a de la pub plus que du jeu!!!! ### 5/5 — Great game! *2019-06-16* Whoever created this game is a genius ### 5/5 — Good game *2019-06-16* So good and easy ### 5/5 — Can’t stop *2019-06-16, version 5.5.2* Great, addicting game ### 5/5 — Too much fun! *2019-06-16, version 5.5.2* I love the challenges and levels. ## Frequently asked questions about iO ### What is iO - A Physics Platformer about? iO is a physics-based platformer that challenges players to solve over 225 mazes by manipulating size, speed, and momentum. It features unique gameplay elements such as portals and inverted gravity, offering a fresh take on the genre. ### What are the key features of this game? Key features include the ability to play with size, weight, and mass to solve puzzles, over 225 unique mazes, intuitive touch controls, global leaderboards for competition, unlockable achievements, and a variety of gameplay mechanics like gravity manipulation and portals. ### How much does iO - A Physics Platformer cost? The application is free to download and play. It offers in-app purchases, which may include additional content or features, but the core game and its extensive puzzles are accessible without upfront payment. ### What kind of gameplay mechanics can I expect? The game offers a wide variety of unique mechanics designed to challenge players. These include manipulating the size, weight, and mass of your character, using portals to traverse levels, experiencing inverted gravity, and interacting with vehicles. ### Who is this game designed for? This game is designed for players who enjoy challenging puzzle platformers that require strategic thinking and precise control. It appeals to those who appreciate innovative gameplay mechanics and enjoy competing with others on global leaderboards. ## Version history (last 5 releases) ### 5.5.2 — 2019-04-09 Adaptation optimization for iPhoneX series. ### 5.5.1 — 2019-04-03 - Fixed some small bugs. - Improved user experiences. ### 5.5.0 — 2019-03-22 - First time to release the freemium version, feel free to play! - Improvements on localisations, newly-added Simplified Chinese and Traditional Chinese. - Improved level unlocking mode, more challenges for you! ### 5.4.0 — 2018-10-20 We've added 75 new levels for your playing pleasure. But beware! The Irresistible level pack will be a true challenge of your iO gaming skills, featuring a brand new set of the most challenging levels you've come across. We've also spiced up the graphics a little bit, fixed a small bug and added GameVice support. ### 1.2 — 2015-04-28 Bug fixes ## Apps similar to iO | App | Rating | Price | Category | | --- | --- | --- | --- | | [Golf Odyssey 2](https://appshunter.io/ios/app/golf-odyssey-2/id6443814003) | 4.8 (2,002) | Free | Games | | [Shoot The Moon](https://appshunter.io/ios/app/shoot-the-moon/id809390893) | 4.7 (5,018) | Free | Games | | [Lunar Lander Mission](https://appshunter.io/ios/app/lunar-lander-mission/id6464110036) | 4.4 (125) | Free | Games | | [Climb Fling](https://appshunter.io/ios/app/climb-fling/id1560209738) | 4.6 (635) | Free | Games | | [circloO - Physics Platformer](https://appshunter.io/ios/app/circloo-physics-platformer/id1612957699) | 4.8 (2,431) | Free | Games | | [Cookies Must Die](https://appshunter.io/ios/app/cookies-must-die/id1482634275) | 4.7 (1,271) | Free | Games | ## More apps by Gamious B.V. - [Lines the Game](https://appshunter.io/ios/app/lines-the-game/id904207373) - [Words in Progress](https://appshunter.io/ios/app/words-in-progress/id1021231678) - [Turmoil+](https://appshunter.io/ios/app/turmoil-plus/id6446276883) All apps by Gamious B.V.: https://appshunter.io/developer/539181337 ## Related topics [coredy](https://appshunter.io/ios/topics/coredy) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-09.*