# DarkFlex vs River.

The clearest difference is update cadence: DarkFlex at every 2 weeks against River.'s every 2 months. 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.

DarkFlex ships an update every 2 weeks, River. every 2 months. Both last shipped on October 1, 2026.

## The numbers

| Metric | DarkFlex | River. |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Monetization | — | Free |
| Size | 18 MB | 94 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [VIACHESLAV RYCHKOV](https://appshunter.io/developer/1697453708) | [Andrei Persiianov](https://appshunter.io/developer/1738275077) |

## What reviewers say

### DarkFlex

[App page](https://appshunter.io/ios/app/darkflex/id6451300940)

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

**In-app purchases:** none


### River.

[App page](https://appshunter.io/ios/app/river/id6723888838)

Manage your fitness club membership with ease. Access schedules, book classes, and purchase services instantly. Stay updated with club news and manage your account details.

**Highlights:** 24/7 workout schedule access, One-click class booking and cancellation, Club news and promotions, Instant service purchases, Membership and account management, Contact club information

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

**In-app purchases:** none


## Frequently asked questions

### Is DarkFlex free?

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

### Is River. free?

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

### Do DarkFlex or River. have ads?

Neither DarkFlex nor River. shows ads.

### Which is updated more often, DarkFlex or River.?

DarkFlex ships an update every 2 weeks, and River. every 2 months. Most recently, DarkFlex was updated on October 1, 2026 and River. on October 1, 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.*