# Shifter vs Ring Sizer

The clearest difference is in-app purchases: Shifter at none against Ring Sizer's 2. Shifter also leads on device support (3 vs 1). Ring Sizer's advantage is update cadence (every 3 days vs every 3 weeks) and iOS requirement (18.6 vs 26.0). On price and ads there is nothing between them.

Both are free to download. Ring Sizer sells 2 in-app purchases, starting at $4.99 per 7 days. Shifter asks for nothing beyond the download.

Shifter ships an update every 3 weeks, Ring Sizer every 3 days. The most recent releases landed on October 8, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Shifter | Ring Sizer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Size | 21 MB | 9 MB |
| Requires iOS | 26.0 | **18.6** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Matija Lukanc](https://appshunter.io/developer/1859391100) | [Jack Oehling](https://appshunter.io/developer/1848598108) |

## What reviewers say

### Shifter

[App page](https://appshunter.io/ios/app/shifter-timetracker/id6756235954)

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases:** none


### Ring Sizer

[App page](https://appshunter.io/ios/app/ring-sizer-measuring-tool/id6759196779)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $4.99 | per 7 days |
| Yearly | $24.99 | per year |


## Frequently asked questions

### Is Shifter free?

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

### Is Ring Sizer free?

Ring Sizer is free to download, with in-app purchases available.

### Do Shifter or Ring Sizer have ads?

Neither Shifter nor Ring Sizer shows ads.

### Which is updated more often, Shifter or Ring Sizer?

Shifter ships an update every 3 weeks, and Ring Sizer every 3 days. Most recently, Shifter was updated on October 8, 2026 and Ring Sizer on October 15, 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.*