Number Thumber vs Atom Learning
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Number Thumber
Sharpen your mental math skills with this engaging game. Fill in missing digits in arithmetic expressions within a time limit. Customize problem types and operations to create a personalized learning experience.
- Fill in missing digits in arithmetic expressions
- Timed challenges with progress bar
- Customizable problem types and operations
- Support for addition, subtraction, multiplication, and division
- Adjustable difficulty with fractions and negative terms
- Score-based time allocation
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The goal of the game is to provide the missing digits in the arithmetic expressions. There are always at most two missing digits, and one is always to the right from another. The digits are filled by tapping on or sliding over the two controls containing digits from 0 to 9 at the left and right edges of the screen or game window. Left control drives the left missing digit and right control drives the right one. If only one digit is missing in the expression, then it can be chosen by either of the controls. On the mobile devices with the touch screens, the digit controls are most easily operated by the thumbs, hence the name of the game. If the keyboard is present, then the regular numeric keys control the left digit and the keypad keys, if the keypad is present, control the right digit. Both sets of the numeric keys control a single missing digit. Mouse can also be used to click on both the left and the right number controls on the screen. Each problem is given a limited time to be solved, as indicated by the progress bar at the bottom. The correct solution is auto-recognized one second after the numbers were last chosen. If the solution is provided, then the expression will “blow up”. To force immediate acceptance and not wait for a second, tap on the problem area. If the expression won’t blow up this means that your solution is wrong. If the correct solution is not provided during the allocated time, the correct solution will be shown for 3 seconds. Tap on the problem area to force generation the new problem without waiting for 3 seconds. To force regeneration of the problem, tap on the “fast forward” control, to the right of the “play/pause” button Each problem type has its score depending on the complexity. If the keyboard is present, then one can force immediate acceptance or skip viewing the correct answer by pressing “spacebar”. To fast forward to the next problem, press Escape of Tab key. The total score is displayed in the top middle of the screen. The number of seconds allocated for solving a problem is 5 plus the problem’s score. SETTINGS The Settings screen always choosing the types of problems and configuring them. There are to two settings, applied to all problems. a. Calculation vs missing number problems, i.e. A+B=_ vs A+_=C. b. Fractions of the negative terms, the extreme examples would be A-B vs -A-(-B), where A and B are always positive. Problems of five types are available. A problem type is added to the game by checking the checkbox next to it. 1. Simple single step addition, subtraction, multiplication or division. You can choose which of the four operations are included. In the case if additional, each term will be less than 100, and if negative terms are not allowed, then the difference of a subtraction will always be positive. Multiplication and division terms go up to 12. 2. Long operations: addition, subtraction and multiplication. All terms and the result are guaranteed to be positive. The largest term is always more than 100, and the second multiplication term is one digit. 3. Nested brackets: expression like A+(B-(C-D)). It is possible to choose the number of nesting, between 1 and 4. The terms are always one-digit. 4. Multistep expressions: up to two multiplication or divisions, connected by an addition or a subtraction, e.g. AxB – C/D, or A + CxD. 5. Fractions: addition, subtraction, multiplication and division of proper fractions. You can save, edit and delete your game configurations, using the controls on the left half of the Settings screen. Two configurations are provided by default and cannot be edited or deleted. Simple configuration only has the one step problems, containing all operations. Full configuration has all problems, with default settings for the fraction of the missing number problems (33%) and negative terms (25%). https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Atom Learning
This platform offers personalized learning for children aged 7-16, covering maths, English, and reasoning. It adapts to individual progress, prepares for exams, and provides revision tools. Learning syncs across devices for continuous study.
- Adaptive learning across subjects
- 11+ and entrance exam preparation
- GCSE revision with mock tests
- Personalized learning journeys
- Progress tracking and rewards
- Cross-device progress syncing
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Atom Learning is an award-winning online learning platform used by 350,000 families and 2,000+ schools across the UK. This app brings your Atom Learning account to iPhone and iPad, so learning travels with you - at home, on the move, or anywhere in between. Designed for children aged 7 to 16, Atom Learning grows with your child. From building early confidence in Key Stage 2, through 11+ and entrance exam preparation, all the way to GCSE revision. It's one platform that adapts to where your child is now and where they're heading next. This app is for families with an Atom Learning account. Sign in with your existing login and everything is there, ready to go: your child's progress, their personalised learning journey, and their exact place picked up where they left off. What your child can do in the app Learn across maths, English, verbal reasoning and non-verbal reasoning Prepare for 11+ and independent school entrance exams with realistic mock tests Revise for GCSEs with targeted practice, predicted papers with instant marking. Progress through thousands of questions that adapt to their level, keeping them challenged but never overwhelmed Earn rewards and track milestones that keep motivation high Built around how children actually learn Atom Learning's adaptive technology meets your child at the right level and adjusts as they improve, so every session on Atom helps them progress. Instant feedback and clear explanations turn mistakes into growth, and bite-sized sessions fit around busy family life. Everything stays in sync Start on the tablet, continue on the phone, finish on the computer - progress syncs seamlessly across every device. Your child can keep learning on the go, whether or not there's a steady connection. Trusted by families and schools Atom Learning is used in homes and classrooms across the UK, supporting children from Year 3 right through their secondary school years. It's designed to take the guesswork out of learning at home, giving your child a clear path forward and giving you confidence in their progress. New to Atom Learning? Visit our Help Centre to discover how Atom works, what's included, and how it can support your child's learning journey.
Screenshots
Verdict
The clearest difference is in-app purchases: Atom Learning at none against Number Thumber's 2. Number Thumber's advantage is device support (4 vs 2) and iOS requirement (13.0 vs 17.0). On price, update cadence and ads 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. Number Thumber sells 2 in-app purchases, starting at $1.99 per month. Atom Learning asks for nothing beyond the download.
Number Thumber ships an update every 5 weeks, Atom Learning monthly. The most recent releases landed on October 19, 2026 and October 18, 2026 respectively.
| Parameter | Number Thumber | Atom Learning |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | — | 62.5% of reviews |
| Number of ratings | 1 — better | — |
| Update frequency | Every 5 weeks | Monthly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 111 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Baibysoft Ltd | Atom Learning Ltd |
Customer experience
Number Thumber
Atom Learning
In-app purchases
Number Thumber
- Number Thumber monthly$1.991 Month
- NT School Trial 1m$0.99
Atom Learning
No in-app purchases
Questions
Is Number Thumber free?
Is Atom Learning free?
Do Number Thumber or Atom Learning have ads?
Which is updated more often, Number Thumber or Atom Learning?
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