# FlowPeak vs Ostron

The clearest difference is iOS requirement: Ostron at 15.6 against FlowPeak's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

FlowPeak ships an update every 4 weeks, Ostron every 5 weeks. The most recent releases landed on February 25, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | FlowPeak | Ostron |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Every 5 weeks |
| Size | 26 MB | 31 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Immix Concepts, LLC.](https://appshunter.io/developer/1025158102) | [Ostron Ltd.](https://appshunter.io/developer/1749802851) |

## What reviewers say

### FlowPeak

[App page](https://appshunter.io/ios/app/flowpeak/id6470520995)

**Features:** macOS Compatibility

**In-app purchases:** none


### Ostron

[App page](https://appshunter.io/ios/app/ostron/id6476379366)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is FlowPeak free?

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

### Is Ostron free?

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

### Do FlowPeak or Ostron have ads?

Neither FlowPeak nor Ostron shows ads.

### Which is updated more often, FlowPeak or Ostron?

FlowPeak ships an update every 4 weeks, and Ostron every 5 weeks. Most recently, FlowPeak was updated on February 25, 2026 and Ostron on September 24, 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.*