# Flow Fill! vs One

The clearest difference is in-app purchases: Flow Fill! at none against One's 5. Flow Fill! also leads on iOS requirement (15.0 vs 18.0). One's advantage is update cadence (daily vs every 5 weeks). On price, ads and device support there is nothing between them.

Both are free to download. One sells 5 one-off in-app purchases. Flow Fill! asks for nothing beyond the download.

Flow Fill! ships an update every 5 weeks, One daily. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Flow Fill! | One |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.1 (7 ratings)](https://appshunter.io/ios/app/flow-fill/id6755528359/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 5 weeks | **Daily** |
| Monetization | Ad-supported | — |
| Size | 320 MB | 59 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Fundora Games](https://appshunter.io/developer/1838341751) | [Patricia Decker](https://appshunter.io/developer/6797622332) |

## What reviewers say

### Flow Fill!

[App page](https://appshunter.io/ios/app/flow-fill/id6755528359)

This physics-based puzzle game challenges you to predict how liquid flows through connected tanks. Drag numbered balls to lock in your predictions and watch the simulation unfold. Master the logic to progress through increasingly difficult levels.

**Highlights:** Predictive liquid flow puzzles, Physics-based simulation, Progressive difficulty, Intuitive drag-and-drop controls, Real-time visual feedback, Logic-testing gameplay

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

**In-app purchases:** none


### One

[App page](https://appshunter.io/ios/app/one-tap-physics/id6809996170)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 100 Credits | $0.99 | one-time |
| 200 Credits | $1.99 | one-time |
| 300 Credit | $2.99 | one-time |
| 500 Credits | $4.99 | one-time |
| 1000 Credits | $5.99 | one-time |


## Frequently asked questions

### Is Flow Fill! free?

Flow Fill! is free to download, with no in-app purchases.

### Is One free?

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

### Do Flow Fill! or One have ads?

Both Flow Fill! and One show ads.

### Which is updated more often, Flow Fill! or One?

Flow Fill! ships an update every 5 weeks, and One daily. Most recently, Flow Fill! was updated on October 30, 2026 and One on October 31, 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.*