calcMod vs PTS Staff App
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
calcMod
This application helps users perform complex mathematical calculations, including factorials, primality tests, and modular arithmetic. It's designed for students and educators interested in number theory and the properties of integers.
- Factorial calculation up to 80!
- Primality testing with change mod function
- Divisor identification
- Modular exponentiation
- Modular inverse calculation
- Number storage and recall
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What are all the digits of the factorial of 79 and how many digits ? Want to know if a big integer is prime ? The change mod function indicates when the number is prime. Want to know the divisors of an integer ? A prime divisor has no inverse modulo this integer. The "n!" button calculates the factorial of an integer from 0 to 80. Factorial are limited to factorial of 80, but the calculator could calculate them up to 2000 ! (ProX version) The "change mod" (change modulo) function indicates when the modulo is prime. There is a limit to 10^10 for modulo in this FREE version (no limit with ProX version). You can stoke one number and recall it when you want. The "Mod" operation indicates the residue modulo N. The exp function allow modular exponentiation (as + - *) The "INV" function calculates the inverse of an integer modulo N. This app is intended for both mathematics teachers and/or their students, or if you are interested in the beauty of numbers. Enjoy calcMod-Light ! Les commentaires sont disponibles en français (réglages).
PTS Staff App
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PTS Student app system is our core product specially developed for educational institutions, which help to bridge the Gap between Teachers and Students. In Education Field we felt that today’s arena is very much advance, there is lack of understanding between students and teachers, our software helps the teacher to bridge the relationship between teachers, their students and guardian. There is lack of emotional touch in today environment between teachers and student As we used to see in” GURU SHISHYA PRAMPRA”. As well as parents are also very busy, they have no time to understand that What is the main necessitate of their children's for bringing up them for making their future Bright, because Foundation is very much Important for making the Building so educational instructions are the creature of the foundation of their students future, so our software helps theme like a tool to make strong foundation. We developed this software in the guidance of experienced teachers and management
Screenshots
Verdict
The clearest difference is update cadence: PTS Staff App at every 2 months against calcMod's every 18 months. 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.
calcMod ships an update every 18 months, PTS Staff App every 2 months. The most recent releases landed on October 19, 2026 and October 9, 2026 respectively.
| Parameter | calcMod | PTS Staff App |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 18 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 1 MB | 55 MB |
| Age rating | 4+ | 4+ |
| Developer | Alain Cardinaux | Manish Malik |
In-app purchases
calcMod
No in-app purchases
PTS Staff App
No in-app purchases
