Neural Net for Handwriting vs Collatz Explorer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Neural Net for Handwriting
Train and test a neural network for recognizing handwritten digits. Utilize an embedded database or teach it with your own handwriting via camera or touch input.
- Train 3-layer neural nets
- Recognize handwritten digits 0-9
- Use embedded MNIST database
- Teach with smartphone camera
- Teach by writing on screen
- Based on 'Make Your Own Neural Network' book
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This app allows you to train and test a 3-layer neural net with handwritten digits (0...9). For this, you may use the embedded MNIST data base including 40.000 handwritten digits. Furthermore, you can teach the net with your own handwriting by using your smartphone camera or writing on the screen with your finger. The app is based on and inspired by the example of Tariq Rashid given in his book "Make Your Own Neural Network". The app source code is on GitHub.
Collatz Explorer
Explore mathematical sequences with this app. It calculates the standard Collatz sequence for any number you enter and can also display sequences from an alternative 3x-1 function.
- Calculate Collatz sequences
- Calculate 3x-1 function sequences
- Input any number
- Visualize sequences
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A fun app that is capable of showing you any collatz sequence for a number that you input. Also capable of showing you any sequence from an alternate 3x-1 function for any number you input.
Screenshots
Verdict
The clearest difference is review sentiment: Collatz Explorer at 100% against Neural Net for Handwriting's 50%. Collatz Explorer also leads on rating (4.6 vs 2.0). Neural Net for Handwriting's advantage is update cadence (every 5 days vs monthly) and device support (3 vs 1). On price, ratings volume, ads and in-app purchases 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.
Collatz Explorer holds the better App Store score, 4.6 against 2.0. Both are backed by a comparable volume of ratings — 3 and 7 respectively. Written reviews point the same way: 50% of Neural Net for Handwriting's written reviews are positive against 100% of Collatz Explorer's.
Neural Net for Handwriting ships an update every 5 days, Collatz Explorer monthly. The most recent releases landed on October 7, 2026 and October 13, 2026 respectively.
| Parameter | Neural Net for Handwriting | Collatz Explorer |
|---|---|---|
| Price | Free | Free |
| Rating | 2.0 (3 ratings) | 4.6 (7 ratings) — better |
| Positive reviews | 50.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 3 | 7 — better |
| Update frequency | Every 5 days — better | Monthly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 8.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 159 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Frank Zielen | Berk Sucu |
Customer experience
Neural Net for Handwriting
Collatz Explorer
In-app purchases
Neural Net for Handwriting
No in-app purchases
Collatz Explorer
No in-app purchases
Questions
Is Neural Net for Handwriting free?
Is Collatz Explorer free?
Which has better reviews, Neural Net for Handwriting or Collatz Explorer?
Do Neural Net for Handwriting or Collatz Explorer have ads?
Which is updated more often, Neural Net for Handwriting or Collatz Explorer?
Other comparisons
