# Thetis Tools vs sci.calculator

The clearest difference is in-app purchases: Thetis Tools at none against sci.calculator's 1. sci.calculator's advantage is update cadence (every 5 weeks vs every 7 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. sci.calculator sells 1 one-off in-app purchase. Thetis Tools asks for nothing beyond the download.

Thetis Tools ships an update every 7 months, sci.calculator every 5 weeks. The most recent releases landed on September 10, 2026 and December 22, 2025 respectively.

## The numbers

| Metric | Thetis Tools | sci.calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 5 weeks** |
| Size | 50 MB | 49 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Thetis srl](https://appshunter.io/developer/397584184) | [Yukihiro Shioya](https://appshunter.io/developer/1565306192) |

## What reviewers say

### Thetis Tools

[App page](https://appshunter.io/ios/app/thetis-tools/id1460268980)

**Features:** macOS Compatibility

**In-app purchases:** none


### sci.calculator

[App page](https://appshunter.io/ios/app/scicalculator/id1620728508)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| remove Ads | $1.99 | one-time |


## Frequently asked questions

### Is Thetis Tools free?

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

### Is sci.calculator free?

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

### Do Thetis Tools or sci.calculator have ads?

Neither Thetis Tools nor sci.calculator shows ads.

### Which is updated more often, Thetis Tools or sci.calculator?

Thetis Tools ships an update every 7 months, and sci.calculator every 5 weeks. Most recently, Thetis Tools was updated on September 10, 2026 and sci.calculator on December 22, 2025.

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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.*