# Keep it Flowing vs 37S

Keep it Flowing and 37S both sit at 4.0 stars, but that hides the real split: 100% of 37S's written reviews are positive against 33% of Keep it Flowing's. Keep it Flowing's advantage is iOS requirement (6.0 vs 13.0). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.0 for Keep it Flowing against 4.0 for 37S. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews are what separate them: 33% of Keep it Flowing's written reviews are positive against 100% of 37S's.

Keep it Flowing ships an update every 6 months, 37S every 5 months. The most recent releases landed on October 7, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Keep it Flowing | 37S |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (2 ratings)](https://appshunter.io/ios/app/keep-it-flowing/id1163465090/reviews) | [4.0 (2 ratings)](https://appshunter.io/ios/app/37s-37-seconds/id1602845368/reviews) |
| Number of ratings | 2 | 2 |
| Positive reviews | 33.3% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 5 months** |
| Monetization | Free | Free |
| Size | 175 MB | 61 MB |
| Requires iOS | **6.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Avakai Games Private Limited](https://appshunter.io/developer/662870499) | [Andreii Simaranov](https://appshunter.io/developer/1676912439) |

## What reviewers say

### Keep it Flowing

[App page](https://appshunter.io/ios/app/keep-it-flowing/id1163465090)

A simple and relaxing puzzle game where players swipe to align pipes and maintain fluid flow. Enjoy soothing music and compete on global leaderboards.

**Highlights:** Simple gameplay, Relaxing music, Universal app, Game Center leaderboards, Fluid flow mechanics

**Features:** macOS Compatibility

**In-app purchases:** none


### 37S

[App page](https://appshunter.io/ios/app/37s-37-seconds/id1602845368)

A challenging arcade game where players must navigate a square through a maze of moving blocks and walls for 37 seconds. It's an addictive test of reflexes and precision, rumored to be used by the US Air Force for pilot training.

**Highlights:** Hold and drag gameplay, Avoid moving blocks and walls, Test reflexes and precision, Addictive challenge, Simple controls

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

**In-app purchases:** none


## Frequently asked questions

### Is Keep it Flowing free?

Keep it Flowing is free to download, with no in-app purchases.

### Is 37S free?

37S is free to download, with no in-app purchases.

### Which has better reviews, Keep it Flowing or 37S?

Keep it Flowing and 37S are both rated 4.0 out of 5 on the App Store, from 2 and 2 ratings respectively.

### Do Keep it Flowing or 37S have ads?

Neither Keep it Flowing nor 37S shows ads.

### Which is updated more often, Keep it Flowing or 37S?

Keep it Flowing ships an update every 6 months, and 37S every 5 months. Most recently, Keep it Flowing was updated on October 7, 2026 and 37S on September 28, 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.*