# Flow vs HydroValve

The clearest difference is in-app purchases: Flow at none against HydroValve's 1. Flow also leads on ads (none vs shown). HydroValve's advantage is update cadence (daily vs weekly) and device support (3 vs 1). On price there is nothing between them.

Both are free to download. HydroValve sells 1 one-off in-app purchase. Flow asks for nothing beyond the download.

Flow ships an update weekly, HydroValve daily. The most recent releases landed on October 16, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Flow | HydroValve |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Weekly | **Daily** |
| Size | 1 MB | 63 MB |
| Requires iOS | 18.6 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Oleg Grinevich](https://appshunter.io/developer/6782033000) | [AbsoluteNoobStudio](https://appshunter.io/developer/1896690388) |

## What reviewers say

### Flow

[App page](https://appshunter.io/ios/app/flow-connect-dots-puzzle/id6804054280)

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

**In-app purchases:** none


### HydroValve

[App page](https://appshunter.io/ios/app/hydrovalve/id6808785143)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


## Frequently asked questions

### Is Flow free?

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

### Is HydroValve free?

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

### Do Flow or HydroValve have ads?

HydroValve shows ads; Flow does not.

### Which is updated more often, Flow or HydroValve?

Flow ships an update weekly, and HydroValve daily. Most recently, Flow was updated on October 16, 2026 and HydroValve on October 9, 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.*