# UNDERCARD vs Flow Training by Flow Athletic

The clearest difference is update cadence: UNDERCARD at fortnightly against Flow Training by Flow Athletic's every 2 months. Flow Training by Flow Athletic's advantage is device support (4 vs 2). On price, ads, in-app purchases and iOS requirement there is nothing between them.

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

UNDERCARD ships an update fortnightly, Flow Training by Flow Athletic every 2 months. The most recent releases landed on October 16, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | UNDERCARD | Flow Training by Flow Athletic |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Size | 194 MB | 213 MB |
| Requires iOS | 16.0 | **15.5** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [UNDERCARD BOXING](https://appshunter.io/developer/1545529235) | [The Flow Collective Pty Ltd](https://appshunter.io/developer/1458686669) |

## What reviewers say

### UNDERCARD

[App page](https://appshunter.io/ios/app/undercard/id1604596271)

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

**In-app purchases:** none


### Flow Training by Flow Athletic

[App page](https://appshunter.io/ios/app/flow-training-by-flow-athletic/id6498953268)

**Features:** Apple Wallet, Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is UNDERCARD free?

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

### Is Flow Training by Flow Athletic free?

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

### Do UNDERCARD or Flow Training by Flow Athletic have ads?

Neither UNDERCARD nor Flow Training by Flow Athletic shows ads.

### Which is updated more often, UNDERCARD or Flow Training by Flow Athletic?

UNDERCARD ships an update fortnightly, and Flow Training by Flow Athletic every 2 months. Most recently, UNDERCARD was updated on October 16, 2026 and Flow Training by Flow Athletic on October 18, 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.*