# Pythagorus doodlus vs SketchCalc

The clearest difference is update cadence: Pythagorus doodlus at every 6 days against SketchCalc's every 2 weeks. SketchCalc's advantage is iOS requirement (15.0 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Pythagorus doodlus sells 1 in-app purchase, starting at $4.99 per year and SketchCalc sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Pythagorus doodlus ships an update every 6 days, SketchCalc every 2 weeks. Both last shipped on October 28, 2026.

## The numbers

| Metric | Pythagorus doodlus | SketchCalc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 6 days** | Every 2 weeks |
| Size | 7 MB | 48 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Stéphan Barbé](https://appshunter.io/developer/313949257) | [OZGUN EVREN ERTURK](https://appshunter.io/developer/6786822342) |

## What reviewers say

### Pythagorus doodlus

[App page](https://appshunter.io/ios/app/pythagorus-doodlus/id6754364531)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $4.99 | per year |


### SketchCalc

[App page](https://appshunter.io/ios/app/sketchcalc-bill-split-and-math/id6786822339)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SketchCalc Pro | $8.99 | one-time |


## Frequently asked questions

### Is Pythagorus doodlus free?

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

### Is SketchCalc free?

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

### Do Pythagorus doodlus or SketchCalc have ads?

Both Pythagorus doodlus and SketchCalc show ads.

### Which is updated more often, Pythagorus doodlus or SketchCalc?

Pythagorus doodlus ships an update every 6 days, and SketchCalc every 2 weeks. Most recently, Pythagorus doodlus was updated on October 28, 2026 and SketchCalc on October 28, 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.*