# Subtraction Angel vs Ring

The clearest difference is update cadence: Subtraction Angel at every 5 days against Ring's every 32 months. Subtraction Angel also leads on iOS requirement (12.0 vs 15.0). 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.

Subtraction Angel ships an update every 5 days, Ring every 32 months. The most recent releases landed on September 27, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Subtraction Angel | Ring |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Every 5 days** | Every 32 months |
| Size | 44 MB | 103 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Kazuyoshi Izumi](https://appshunter.io/developer/1013586610) | [Rehman Ilyas](https://appshunter.io/developer/1476313108) |

## What reviewers say

### Subtraction Angel

[App page](https://appshunter.io/ios/app/subtraction-angel/id1193937987)

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

**In-app purchases:** none


### Ring

[App page](https://appshunter.io/ios/app/ring-buzz-wire-loop-game/id1476313109)

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

**In-app purchases:** none


## Frequently asked questions

### Is Subtraction Angel free?

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

### Is Ring free?

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

### Do Subtraction Angel or Ring have ads?

Both Subtraction Angel and Ring show ads.

### Which is updated more often, Subtraction Angel or Ring?

Subtraction Angel ships an update every 5 days, and Ring every 32 months. Most recently, Subtraction Angel was updated on September 27, 2026 and Ring on October 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.*