# Design Your Calc vs Thetis Tools

The clearest difference is price: Thetis Tools at Free against Design Your Calc's $0.99. Thetis Tools also leads on update cadence (every 7 months vs every 14 months). Design Your Calc's advantage is iOS requirement (12.0 vs 14.0). On ads, in-app purchases and device support there is nothing between them.

Thetis Tools is free to download; Design Your Calc costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Design Your Calc ships an update every 14 months, Thetis Tools every 7 months. The most recent releases landed on July 18, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Design Your Calc | Thetis Tools |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[2.0 (2 ratings)](https://appshunter.io/ios/app/design-your-calc/id412417899/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 7 months** |
| Monetization | Paid | — |
| Size | 12 MB | 50 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [pyd.app](https://appshunter.io/developer/412417902) | [Thetis srl](https://appshunter.io/developer/397584184) |

## What reviewers say

### Design Your Calc

[App page](https://appshunter.io/ios/app/design-your-calc/id412417899)

This application offers a customizable calculator interface, allowing users to adjust the position and size of buttons and displays to suit their individual needs and preferences. It aims to create a more intuitive and personalized user experience beyond standard rigid layouts.

**Highlights:** Adjustable control positions, Resizable display elements, Personalized user interface, Adaptable to user perception, Intuitive multi-touch interaction

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

**In-app purchases:** none


### Thetis Tools

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Design Your Calc free?

Design Your Calc costs $0.99, with no in-app purchases.

### Is Thetis Tools free?

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

### Do Design Your Calc or Thetis Tools have ads?

Neither Design Your Calc nor Thetis Tools shows ads.

### Which is updated more often, Design Your Calc or Thetis Tools?

Design Your Calc ships an update every 14 months, and Thetis Tools every 7 months. Most recently, Design Your Calc was updated on July 18, 2026 and Thetis Tools on October 26, 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.*