# Star vs KDIGO

The clearest difference is update cadence: KDIGO at every 10 days against Star's every 27 months. Star's advantage is iOS requirement (12.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Star sells 1 one-off in-app purchase and KDIGO sells 2 in-app purchases, starting at $5.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Star ships an update every 27 months, KDIGO every 10 days. The most recent releases landed on October 10, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Star | KDIGO |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 27 months | **Every 10 days** |
| Size | 3 MB | 38 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Siu Yuen Ho](https://appshunter.io/developer/814088527) | [Eduardo Alexandru Apostu](https://appshunter.io/developer/1871906706) |

## What reviewers say

### Star

[App page](https://appshunter.io/ios/app/star-delta-calculator/id1602175282)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Pro feature | $1.99 | one-time |


### KDIGO

[App page](https://appshunter.io/ios/app/kdigo-asistente-de-chat/id6758273227)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| KDIGO Premium Semanal | $5.99 | per 7 days |
| KDIGO Premium Mensual | $22.99 | per month |


## Frequently asked questions

### Is Star free?

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

### Is KDIGO free?

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

### Do Star or KDIGO have ads?

Neither Star nor KDIGO shows ads.

### Which is updated more often, Star or KDIGO?

Star ships an update every 27 months, and KDIGO every 10 days. Most recently, Star was updated on October 10, 2026 and KDIGO 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.*