# Days' vs Ring Sizer App

The clearest difference is in-app purchases: Days' at none against Ring Sizer App's 3. Days' also leads on update cadence (every 4 days vs every 8 days). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Ring Sizer App sells 3 in-app purchases, starting at $1.99 per 7 days. Days' asks for nothing beyond the download.

Days' ships an update every 4 days, Ring Sizer App every 8 days. The most recent releases landed on June 4, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Days' | Ring Sizer App |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 8 days |
| Size | 17 MB | 12 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Daiki Hirao](https://appshunter.io/developer/1480092196) | [Anul Agarwal](https://appshunter.io/developer/1515910661) |

## What reviewers say

### Days'

[App page](https://appshunter.io/ios/app/days/id1581602165)

**Features:** macOS Compatibility

**In-app purchases:** none


### Ring Sizer App

[App page](https://appshunter.io/ios/app/ring-sizer-app-measure-ring/id6751404396)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $1.99 | per 7 days |
| Premium Weekly | $4.99 | per 7 days |
| Premium Yearly | $39.99 | per year |


## Frequently asked questions

### Is Days' free?

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

### Is Ring Sizer App free?

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

### Do Days' or Ring Sizer App have ads?

Neither Days' nor Ring Sizer App shows ads.

### Which is updated more often, Days' or Ring Sizer App?

Days' ships an update every 4 days, and Ring Sizer App every 8 days. Most recently, Days' was updated on June 4, 2026 and Ring Sizer App on September 21, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*