Flow Free vs The Impossible Letter Game
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Flow Free
Connect matching colored pipes to fill the board without crossing or overlapping. Enjoy hundreds of free levels or challenge yourself in timed modes. This addictive puzzle game offers a relaxing yet engaging experience for all skill levels.
- Connect matching colors with pipes
- Fill the entire board
- Over 2,500 free levels
- Daily puzzles
- Time Trial mode
- Multiple board sizes
- Level packs
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Flow Free® is a simple yet addictive puzzle game. Connect matching colors with pipe to create a Flow®. Pair all colors, and cover the entire board to solve each puzzle. But watch out, pipes will break if they cross or overlap! Free play through hundreds of levels, or race against the clock in Time Trial mode. Gameplay ranges from simple and relaxed, to challenging and frenetic, and everywhere in between. How you play is up to you. So, give Flow Free a try, and experience "mind like water"! *** Flow Free features *** * Content - Over 2,500 free levels available in Free Play mode, and new Daily Puzzles every day! - 10 different board sizes - Free Classic, Bonus, Bridges, Mania, Extreme, and Jumbo level packs - Additional level packs available for purchase * Challenge - Game Center achievements as you solve levels and complete packs - Track your completion of each level in Free Play mode - Strive for accuracy in Free Play using the fewest, most efficient moves - Strive for speed in Time Trial for the most and fastest solves - 20 scored Time Trial variants to choose from by board size and duration * Look & Feel - Smooth, polished touch interaction - Colorful UI - Fun sound effects - Clean vector graphics and animations - Labels available for color impaired players Enjoy.
The Impossible Letter Game
Test your visual acuity and focus with this challenging puzzle game. It presents simple yet incredibly difficult levels designed to push your observational skills to the limit. Prepare for an extreme eye exercise.
- Extreme eye exercise
- Challenging puzzles
- Skill testing
- Simple gameplay
- Impossible levels
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THE ULTIMATE EXTREME EYE EXERCISE GAME! The simplest and yet the most impossible game ever! Put your skills to the test, because this game will challenge you like never before. Good luck finding the most!
Screenshots
Verdict
The clearest difference is ratings volume: Flow Free at 408K against The Impossible Letter Game's 17K. Flow Free also leads on rating (4.8 vs 4.6) and chart position (#48 vs unranked). On price, review sentiment, update cadence and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Flow Free sells 10 one-off in-app purchases and The Impossible Letter Game sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Flow Free holds the better App Store score, 4.8 against 4.6. That said, the two scores are not equally well evidenced: Flow Free has 408K ratings behind it against 17K, so its average is the more settled of the two. Written reviews point the same way: 82% of Flow Free's written reviews are positive against 81% of The Impossible Letter Game's.
Flow Free ships an update every 5 months, The Impossible Letter Game every 4 months. Both last shipped on November 8, 2026.
| Parameter | Flow Free | The Impossible Letter Game |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (408K ratings) — better | 4.6 (17K ratings) |
| Positive reviews | 82.5% of reviews — better | 81.4% of reviews |
| Number of ratings | 408K — better | 17K |
| Update frequency | Every 5 months | Every 4 months — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | #48 — better | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 17.1 |
| Further details — not scored | ||
| Size | 77 MB | 75 MB |
| Age rating | 4+ | 4+ |
| Developer | Big Duck Games LLC | GammaLateral LLC |
Customer experience
Flow Free
The Impossible Letter Game
User reviews
Flow Free
From 408K App Store ratingsWhat we love
- 👍 Relaxing and fun
- 🧠 Challenges the brain
- ⏱️ Good for passing time
- 🔓 No WiFi required
- 💻 Works well on different devices
Room to improve
- 🔍 Ads can be intrusive
- 💰 Hints/levels can be expensive
- 🤯 Levels can get too difficult
- 🔁 Daily streak issues
The Impossible Letter Game
From 17K App Store ratingsWhat we love
- 👍 Fun and challenging game
- 🧠 Helps improve focus and attention to detail
- 🎨 Visually appealing design
- 🕹️ Addictive gameplay
Room to improve
- 🔍 Some levels are too difficult
- 🕰️ Timer continues running during ads
- 💰 Too many ads
- 🤕 Can strain the eyes
Bugs and requests
Flow Free
Reported bugs
2 issues- Game freezing or crashing
- Ads getting stuck and preventing progress
Requested features
4 requests- More challenging levels for older players
- Ability to earn hints through gameplay
- Option to change background color for themes
- Sync progress across devices
The Impossible Letter Game
Reported bugs
2 issues- Inconsistent level difficulty
- Crashing and freezing issues
Requested features
3 requests- Option to skip difficult levels
- Pause timer during level transitions
- More game modes and level variety
In-app purchases
Flow Free
- 5 Hints$0.99
- Green Pack$1.99
- Blue Pack$1.99
Show 7 moreShow fewer
- Purple Pack$1.99
- 10x10 Mania$1.99
- Starter Bundle$1.99
- Unlock All Themes$1.99
- 20 Hints$2.99
- Unlock All Packs and Remove Ads$4.99
- 100 Hints$9.99
The Impossible Letter Game
- Get 30 Hints$0.99
- Get 70 Hints$1.99
- Get 120 Hints$2.99
Show 1 moreShow fewer
- Remove Ads$9.99
Questions
Is Flow Free free?
Is The Impossible Letter Game free?
Which has better reviews, Flow Free or The Impossible Letter Game?
Do Flow Free or The Impossible Letter Game have ads?
Which is updated more often, Flow Free or The Impossible Letter Game?
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