# FlowCheck vs Helios FDR

The clearest difference is update cadence: Helios FDR at every 7 months against FlowCheck's every 15 months. Helios FDR also leads on iOS requirement (12.0 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.

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

FlowCheck ships an update every 15 months, Helios FDR every 7 months. The most recent releases landed on November 7, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | FlowCheck | Helios FDR |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 7 months** |
| Monetization | — | Free |
| Size | 15 MB | 78 MB |
| Requires iOS | 16.0 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [TROX GmbH](https://appshunter.io/developer/968659913) | [Helios Ventilatoren GmbH + Co KG](https://appshunter.io/developer/1553902986) |

## What reviewers say

### FlowCheck

[App page](https://appshunter.io/ios/app/flowcheck/id1501706128)

**Features:** Apple Wallet

**In-app purchases:** none


### Helios FDR

[App page](https://appshunter.io/ios/app/helios-fdr/id1553902744)

This application allows users to intuitively customize and monitor their Helios differential humidity control systems. Users can define humidity and temperature setpoints, configure weekly programs for sleep cycles, and log data for up to four weeks. It is designed to manage multiple FDR systems.

**Highlights:** Customize humidity and temperature setpoints, Configure weekly programs for sleep cycles, Log and export temperature/humidity data, Manage multiple FDR systems, Define minimum room temperature

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

**In-app purchases:** none


## Frequently asked questions

### Is FlowCheck free?

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

### Is Helios FDR free?

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

### Do FlowCheck or Helios FDR have ads?

Neither FlowCheck nor Helios FDR shows ads.

### Which is updated more often, FlowCheck or Helios FDR?

FlowCheck ships an update every 15 months, and Helios FDR every 7 months. Most recently, FlowCheck was updated on November 7, 2026 and Helios FDR on November 3, 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.*