NumbersLettersWords vs Combinatorics Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
NumbersLettersWords
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This application is designed for children 4-7 years old, as well as their parents, to learn letters, numbers and the most common words in several languages (currently in Russian, English and German).
Combinatorics Calculator
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Finish your homework instantly. Prepare for exams without stress. Free, complete step-by-step solutions. Enter your values and calculate permutations, combinations, and variations – with and without repetition. HOW IT WORKS Enter your values in the correct fields and get started. You’ll receive the solution instantly and can share it with friends or classmates. YOUR PERSONAL DATA We don’t need it. Only anonymized data is collected, for example: - which features are used - how many solutions are generated This helps us improve. We cannot identify you. COSTS Everything is free to use. 24/7 access to your solutions. All solution steps are always complete. If you need many solutions in a short time, additional purchase options are available. EXTRAS - curated learning videos - feedback on incorrect inputs - manage your own solutions - app introduction CONTACT Questions or feedback via Discord or directly in the app review.
Screenshots
Verdict
The clearest difference is update cadence: Combinatorics Calculator at every 3 weeks against NumbersLettersWords's every 51 months. NumbersLettersWords's advantage is iOS requirement (12.0 vs 15.0). 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. NumbersLettersWords sells 1 one-off in-app purchase and Combinatorics Calculator sells 8 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
NumbersLettersWords ships an update every 51 months, Combinatorics Calculator every 3 weeks. The most recent releases landed on October 3, 2026 and October 24, 2026 respectively.
| Parameter | NumbersLettersWords | Combinatorics Calculator |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 51 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 11 MB | 180 MB |
| Age rating | 4+ | 4+ |
| Developer | Sergey Panarin | Glindemann, Sennoun, Langer GbR |
In-app purchases
NumbersLettersWords
- Removed ads, more options.$1.99
Combinatorics Calculator
- +30 User Tokens$0.29
- +1 Convenience Token / 6h, max. +2$0.59
- +2 Convenience Tokens / 6h, max. +4$0.99
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- +150 User Tokens$0.99
- +300 User Tokens$1.49
- +4 Convenience Tokens / 6h, max. +8$1.59
- Lifetime Access$1.99
- Remove Ads$1.99
Questions
Is NumbersLettersWords free?
Is Combinatorics Calculator free?
Do NumbersLettersWords or Combinatorics Calculator have ads?
Which is updated more often, NumbersLettersWords or Combinatorics Calculator?
Other comparisons
