Think3000 vs Combinatorics PRO
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Think3000
This app offers a fun way to learn and boost your brainpower by condensing vast amounts of knowledge from various subjects into bite-sized pieces. It's designed to be engaging for users aged 7 and above.
- Condensed knowledge bits
- Covers Science, Math, English, History
- Brain boosting exercises
- Fun and engaging learning
- Suitable for ages 7+
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Think3000 is a learning and brain boosting app. We have condensed massive volumes of knowledge ranging from Science, to Math, to English Language Arts, to American History and more, into knowledge bits to help build and boost your brain power. It is a lot of fun to use. Suitable for ages 7 and above.
Combinatorics PRO
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Finally there is the app that provides all 6 variations of combinatorics with step by step solutions: - permutation without repetition: Arranging elements without repetition. - permutation with repetition: Arranging elements with repetition. - combination without repetition: Selecting elements without considering the order. - combination with repetition: Selecting elements with consideration of the order. - variation without repetition: Arranging elements with fixed length without repetition. - variation with repetition: Arranging elements with fixed length with repetition. You only have to enter your values k and n. The values must be entered as natural numbers. The only exception is the k value for permutation with repitition. This requires several k values, which must be entered separated by semicolons. All calculations are stored in the history. The final solution can be shared. [ Contents ] - all 6 variations of combinatorics - results are calculated and shown in detail - history to save the input - detailed solution - natural numbers are supported - no ads! [ Usage ] - there are fields for entering values using a special keyboard - multiple k values can be entered using the semicolon key - press the check mark button at the bottom right to start the calculation - if values are missing, the corresponding field is highlighted in yellow - if the values are incorrect, the affected field will be highlighted in red - a short message explains why a value is incorrect - the entries in the history can be deleted or sorted - if you select an entry in the history, it will be automatically loaded for the calculation - the whole history can be deleted by pressing a button - solutions can be shared
Screenshots
Verdict
The clearest difference is price: Think3000 at Free against Combinatorics PRO's $1.99. Combinatorics PRO's advantage is update cadence (monthly vs every 17 months). On ads, 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
Think3000 is free to download; Combinatorics PRO costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Think3000 ships an update every 17 months, Combinatorics PRO monthly. The most recent releases landed on June 11, 2026 and September 7, 2026 respectively.
| Parameter | Think3000 | Combinatorics PRO |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | 5.0 (4 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 17 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.1 | 15.0 — better |
| Further details — not scored | ||
| Size | 156 MB | 179 MB |
| Age rating | 4+ | 4+ |
| Developer | Alex Audu | Glindemann, Sennoun, Langer GbR |
In-app purchases
Think3000
No in-app purchases
Combinatorics PRO
No in-app purchases
Questions
Is Think3000 free?
Is Combinatorics PRO free?
Do Think3000 or Combinatorics PRO have ads?
Which is updated more often, Think3000 or Combinatorics PRO?
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