Q Calculator vs Mailinblack
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Q Calculator
This app provides optimal parameters for cutting, bending, welding, or machining specific steel types. Input basic steel information to receive precise machine setup guidance for high-quality results. It functions offline, ensuring accessibility in any location.
- Steel parameter calculation
- Cutting, bending, welding guidance
- Machining optimization
- Offline functionality
- Multi-language support
- High-quality work output
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Q Calculator helps you to find all the optimal parameters for cutting, bending, welding or machining QUARD (abrasion resistant steel) and QUEND (high yield strength steel). By selecting the type of work you need to perform and entering basic information about our steels, you’ll get precise answers on how to set up your machine and to undertake your task easily. So you can deliver neat and high quality work in a jiffy. As it works offline, you have always the results, wherever you are in the workshop or on the field and whenever you want. Q Calculator is available in different languages.
Mailinblack
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Your passwords and email, together on mobile Your data deserves protection that is simple, comprehensive, and always within reach. That is why My Sikker and My Protect are now available in the Mailinblack mobile app: your password manager and protected email, wherever you are. My Sikker supports you every day and gives you peace of mind. Mailinblack makes strong passwords the standard for all your needs. Every password is securely protected yet instantly accessible through a simple, intuitive interface that never compromises your security. My Protect gives you control over your email directly from your phone: review quarantined emails, take action in seconds, and manage your approved or blocked senders wherever you are. With the Mailinblack mobile app, your passwords and email are always within reach, so you remain in control of your security wherever you are, at any time. To use the mobile app, you must have a Mailinblack professional licence. Don’t have a licence? Discover Mailinblack: https://www.mailinblack.com/demo/
Screenshots
Verdict
The clearest difference is update cadence: Mailinblack at every 3 weeks against Q Calculator's every 14 months. Q Calculator's advantage is iOS requirement (15.1 vs 18.0). On price, ads, in-app purchases and device support 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.
Q Calculator ships an update every 14 months, Mailinblack every 3 weeks. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.
| Parameter | Q Calculator | Mailinblack |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 14 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.1 — better | 18.0 |
| Further details — not scored | ||
| Size | 30 MB | 99 MB |
| Age rating | 4+ | 17+ |
| Developer | ArtWhere s.a. | Mailinblack |
In-app purchases
Q Calculator
No in-app purchases
Mailinblack
No in-app purchases









