# MechTab vs GraphiKai

The clearest difference is in-app purchases: MechTab at none against GraphiKai's 1. GraphiKai's advantage is update cadence (every 4 weeks vs every 9 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. GraphiKai sells 1 one-off in-app purchase. MechTab asks for nothing beyond the download.

MechTab ships an update every 9 months, GraphiKai every 4 weeks. The most recent releases landed on October 17, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | MechTab | GraphiKai |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (16 ratings)](https://appshunter.io/ios/app/mechtab/id553201101/reviews)** | — |
| Number of ratings | **16** | — |
| Positive reviews | 88.6% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 4 weeks** |
| Monetization | Free | — |
| Size | 9 MB | 39 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Werder AG](https://appshunter.io/developer/553201104) | [Ibrahim Zaougui](https://appshunter.io/developer/1788547020) |

## What reviewers say

### MechTab

[App page](https://appshunter.io/ios/app/mechtab/id553201101)

This app offers a comprehensive set of tools for mechanics, providing essential data on tolerances, threads, cutting speeds, wrench sizes, and roughness. It also includes calculators for material weight, triangle properties, and trowalisation.

**Highlights:** ISO-Tolerance data (holes and shafts), Thread specifications, Cutting data calculations, Wrench size conversions, Roughness parameters, Material weight calculator, Triangle property calculator

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

**In-app purchases:** none


### GraphiKai

[App page](https://appshunter.io/ios/app/graphikai/id6755329159)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Themes | $4.99 | one-time |


## Frequently asked questions

### Is MechTab free?

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

### Is GraphiKai free?

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

### Do MechTab or GraphiKai have ads?

Neither MechTab nor GraphiKai shows ads.

### Which is updated more often, MechTab or GraphiKai?

MechTab ships an update every 9 months, and GraphiKai every 4 weeks. Most recently, MechTab was updated on October 17, 2026 and GraphiKai on October 7, 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.*