# Return Window Radar vs CardMaster

The clearest difference is in-app purchases: CardMaster at none against Return Window Radar's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Return Window Radar sells 1 one-off in-app purchase. CardMaster asks for nothing beyond the download.

Both ship on a similar rhythm, roughly weekly. Both last shipped on October 25, 2026.

## The numbers

| Metric | Return Window Radar | CardMaster |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | Weekly |
| Size | 50 MB | 7 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Antonio Vargas](https://appshunter.io/developer/1785352771) | [景辉 何](https://appshunter.io/developer/6792008042) |

## What reviewers say

### Return Window Radar

[App page](https://appshunter.io/ios/app/return-window-radar/id6785049120)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Radar Pro - Unlimited Tracking | $2.99 | one-time |


### CardMaster

[App page](https://appshunter.io/ios/app/cardmaster-reward-tracker/id6792032626)

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

**In-app purchases:** none


## Frequently asked questions

### Is Return Window Radar free?

Return Window Radar is free to download, with in-app purchases available.

### Is CardMaster free?

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

### Do Return Window Radar or CardMaster have ads?

Neither Return Window Radar nor CardMaster shows ads.

### Which is updated more often, Return Window Radar or CardMaster?

Return Window Radar ships an update weekly, and CardMaster weekly. Most recently, Return Window Radar was updated on October 25, 2026 and CardMaster on October 25, 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.*