Comparison

MechTab vs ColorMyPDF

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

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

About

ColorMyPDF

Features
Read 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

MechTab4 screens
ColorMyPDF4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

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.

Scorecard2 real differences · 8 level
MechTab versus ColorMyPDF: the parameters behind the verdict, then further details
ParameterMechTabColorMyPDF
PriceFreeFree
Rating4.1 (16 ratings) — better—
Positive reviews88.6% of reviews—
Number of ratings16 — better—
Update frequencyEvery 9 monthsEvery 4 weeks — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.015.0
Further details — not scored
Size9 MB8 MB
Age rating4+4+
DeveloperWerder AGInias Group LLC

In-app purchases

None

MechTab

No in-app purchases

None

ColorMyPDF

No in-app purchases

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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