# Flow Free vs The Impossible Letter Game

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 (#46 vs unranked). On price, review sentiment, update cadence and ads there is nothing between them.

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. The most recent releases landed on November 9, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Flow Free | The Impossible Letter Game |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (408K ratings)](https://appshunter.io/ios/app/flow-free/id526641427/reviews)** | [4.6 (17K ratings)](https://appshunter.io/ios/app/the-impossible-letter-game/id852152318/reviews) |
| Number of ratings | **408K** | 17K |
| Positive reviews | **82.5% of reviews** | 81.4% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 5 months | **Every 4 months** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | **#46** | — |
| Size | 77 MB | 75 MB |
| Requires iOS | **15.0** | 17.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Big Duck Games LLC](https://appshunter.io/developer/435664937) | [GammaLateral LLC](https://appshunter.io/developer/685178329) |

## What reviewers say

### Flow Free

[App page](https://appshunter.io/ios/app/flow-free/id526641427)

**Currently charting:** #46 Top Free · Board, #85 Top Grossing · Board, #174 Top Free · Puzzle (US App Store)

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.

**Highlights:** Connect matching colors with pipes, Fill the entire board, Over 2,500 free levels, Daily puzzles, Time Trial mode, Multiple board sizes, Level packs

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 5 Hints | $0.99 | one-time |
| Green Pack | $1.99 | one-time |
| Blue Pack | $1.99 | one-time |
| Purple Pack | $1.99 | one-time |
| 10x10 Mania | $1.99 | one-time |
| Starter Bundle | $1.99 | one-time |
| Unlock All Themes | $1.99 | one-time |
| 20 Hints | $2.99 | one-time |
| Unlock All Packs and Remove Ads | $4.99 | one-time |
| 100 Hints | $9.99 | one-time |

**What reviewers like**

- 👍 Relaxing and fun
- 🧠 Challenges the brain
- ⏱️ Good for passing time
- 🔓 No WiFi required
- 💻 Works well on different devices

**What reviewers complain about**

- 🔍 Ads can be intrusive
- 💰 Hints/levels can be expensive
- 🤯 Levels can get too difficult
- 🔁 Daily streak issues

**Reported bugs**

- Game freezing or crashing
- Ads getting stuck and preventing progress

**Requested features**

- 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

[App page](https://appshunter.io/ios/app/the-impossible-letter-game/id852152318)

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.

**Highlights:** Extreme eye exercise, Challenging puzzles, Skill testing, Simple gameplay, Impossible levels

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Get 30 Hints | $0.99 | one-time |
| Get 70 Hints | $1.99 | one-time |
| Get 120 Hints | $2.99 | one-time |
| Remove Ads | $9.99 | one-time |

**What reviewers like**

- 👍 Fun and challenging game
- 🧠 Helps improve focus and attention to detail
- 🎨 Visually appealing design
- 🕹️ Addictive gameplay

**What reviewers complain about**

- 🔍 Some levels are too difficult
- 🕰️ Timer continues running during ads
- 💰 Too many ads
- 🤕 Can strain the eyes

**Reported bugs**

- Inconsistent level difficulty
- Crashing and freezing issues

**Requested features**

- Option to skip difficult levels
- Pause timer during level transitions
- More game modes and level variety


## Frequently asked questions

### Is Flow Free free?

Flow Free is free to download, with in-app purchases available.

### Is The Impossible Letter Game free?

The Impossible Letter Game is free to download, with in-app purchases available.

### Which has better reviews, Flow Free or The Impossible Letter Game?

Flow Free is rated higher. Flow Free averages 4.8 out of 5 from 408K ratings, while The Impossible Letter Game averages 4.6 from 17K ratings.

### Do Flow Free or The Impossible Letter Game have ads?

Both Flow Free and The Impossible Letter Game show ads.

### Which is updated more often, Flow Free or The Impossible Letter Game?

Flow Free ships an update every 5 months, and The Impossible Letter Game every 4 months. Most recently, Flow Free was updated on November 9, 2026 and The Impossible Letter Game on November 8, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*