MechTab vs ColorMyPDF
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MechTab
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.
- ISO-Tolerance data (holes and shafts)
- Thread specifications
- Cutting data calculations
- Wrench size conversions
- Roughness parameters
- Material weight calculator
- Triangle property calculator
Read full descriptionHide full description
Werder AG introduces the ultimate tool for mechanics. MechTab provides information about ISO-Tolerances, Threads, Cutting Data, Wrench Size and Roughness. Tolerances: A - ZC, holes and shafts General Tolerances: Charts for linear dimensions, radii/chamfer and angular dimensions. Geometrical Tolerances: Symbols, drawings and explanations as well as charts for the different geometrical tolerances. Threads: BA, BSF, G, Heli-Coil, M, MF, Pg, Tr, UNC, UNEF, UNF, W, Metric-Non-Standard Cutting Data: Cutting Speed and Spindle Speed, Feed Rates, Processing duration Wrench-Size to Width across Corners: 4-,6-8-,10-,12-,14-Cornered Torque: 3.6, 6.9, 8.8, 10.9, 12.9 Roughness: Rz, Ra, N, Triangle-Notation Weight: calculate the weight of different materials in different profiles. Material list is editable. Triangle: calculate sides, angles and the area of a triangle by entering 3 values according to a drawing. Trowalisation: calculate the number of pieces
ColorMyPDF
Read full descriptionHide full description
ColorMyPDF — Color any PDF and print it, even without black ink. Out of black ink at the worst moment? ColorMyPDF transforms any PDF document into a clean monochrome version in the color of your choice — blue, red, green, purple or any custom color — ready to print right away. HOW IT WORKS 1. Upload your PDF (up to 50 MB) 2. Pick one of 8 preset colors or choose any custom color 3. Optionally tint the page background too 4. Download or share your colorized PDF in seconds WHY COLORMYPDF? • Print with any ink cartridge — perfect when black ink runs out • Real-time color preview before you convert • High-quality output at 300 DPI — text stays crisp and sharp • Custom color picker with HEX input for exact brand colors • Background tint option for full-page colorization • Fast cloud processing — most documents ready in seconds • Share directly to Mail, Files, WhatsApp, Drive and more PRIVATE BY DESIGN • No account, no sign-up, no tracking • Files are processed securely and automatically deleted after 30 minutes • Your documents never leave the encrypted connection WORKS IN 14 LANGUAGES English, Español, Français, Deutsch, Português, 中文, 繁體中文, 日本語, Русский, العربية, اردو, हिन्दी, বাংলা, Indonesia. Whether it's a boarding pass, a contract, homework or a shipping label — never let an empty black cartridge stop you again. Download ColorMyPDF for free and print in any color!
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | MechTab | ColorMyPDF |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (16 ratings) — better | — |
| Positive reviews | 88.6% of reviews | — |
| Number of ratings | 16 — better | — |
| Update frequency | Every 9 months | Every 4 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 9 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Werder AG | Inias Group LLC |
In-app purchases
MechTab
No in-app purchases
ColorMyPDF
No in-app purchases
Questions
Is MechTab free?
Is ColorMyPDF free?
Do MechTab or ColorMyPDF have ads?
Which is updated more often, MechTab or ColorMyPDF?
Other comparisons















