# MechTab vs ColorMyPDF

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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

MechTab ships an update every 9 months, ColorMyPDF every 4 weeks. The most recent releases landed on October 17, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | MechTab | ColorMyPDF |
| --- | --- | --- |
| 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 | No |
| Ads | **No** | Yes |
| Update frequency | Every 9 months | **Every 4 weeks** |
| Monetization | Free | — |
| Size | 9 MB | 8 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Werder AG](https://appshunter.io/developer/553201104) | [Inias Group LLC](https://appshunter.io/developer/6802056422) |

## 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


### ColorMyPDF

[App page](https://appshunter.io/ios/app/colormypdf/id6802056420)

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

**In-app purchases:** none


## Frequently asked questions

### Is MechTab free?

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

### Is ColorMyPDF free?

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

### Do MechTab or ColorMyPDF have ads?

ColorMyPDF shows ads; MechTab does not.

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

MechTab ships an update every 9 months, and ColorMyPDF every 4 weeks. Most recently, MechTab was updated on October 17, 2026 and ColorMyPDF on October 16, 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.*