NumBots vs Spelltronaut
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
NumBots
This platform helps children master mental addition and subtraction, moving them from counting to calculating. It focuses on building understanding, recall, and fluency in these core math skills. Designed for early learners, it offers an engaging way to achieve mathematical proficiency.
- Master mental addition
- Master mental subtraction
- Build understanding
- Develop recall
- Achieve fluency
- Transition from counting to calculating
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Addition & Subtraction. Solved. From the innovators who bring you Times Tables Rock Stars, comes a highly engaging platform for learning to add and subtract… NumBots! NumBots is all about every child achieving the “triple win” of understanding, recall and fluency in mental addition and subtraction, so that they move from counting to calculating. Suitable from Year 1 (UK) or Kindergarten (US) upwards. Younger players will be able to access the early stages from a mathematical point of view but will find it increasingly harder to reach the level of fluency required to make continued progress.
Spelltronaut
This app supports home learning for primary school spelling, aligning with national curriculum guidelines. It uses a proven 'look, say, cover, write, check' method to help children master spelling words and improve their vocabulary and typing skills.
- Structured spelling program
- National curriculum alignment (KS1 & KS2)
- Look, say, cover, write, check method
- Weekly spelling lists by year group
- Example sentences for homophones
- Native English pronunciation audio
- Progress tracking and scores
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Spelltronaut : Primary Spelling is a spelling app which follows a structured spelling program same as kids study in school to support home learning. While developing Spelltronaut we followed the government guidance on English programmes of study (KS1 & KS2) national curriculum spelling words and have included all statutory, non-statutory words and more. We use a proven method to help kids learn spelling similar to school and the home learning activity: look, say, cover, write and check. Our aim is to provide an easy to use tool for home learning and support kids’ school learning activities. Our Aims : - Make spelling accessible, achievable and support kids’ learning of English spelling, - Help families to convert kids’ screen time towards positive habits, - Provide access to native English pronunciation to families whose first lanugage is not English, - Provide a new home learning environment to kids for practicing weekly spellings, - Support school learning with a programme featuring aspects of the national curriculum. How It Works : Kids learning focuses on appropriate study for different year groups so in Spelltronaut : Primary Spelling game, words are grouped in primary school year groups. The programme follows weekly spelling lists grouped in coloured rows for each term. The only thing kids need to do is to choose weekly spelling same as school learning and study at home freely and whenever they choose. After selecting weekly spelling kids will see the list of words and have time to study and learn the words before starting their weekly spelling test. Enabling tips will show an example sentence to help spelling if you are learning homophones or near homophones. It is possible to listen to the English words again if you struggle to hear them at first. Type words and click check to see if the English words are correct. If misspelt kids will see the correct spelling. At the end of the spelling test, kids will be able to see their score, their mistakes and learn from them. Study more to achieve better scores. Spelltronaut : Primary Spelling provides every kid with a home learning tool to help them study and get 10/10 every spelling test. In addition to improving kids’ spelling, Spelltronaut : Primary Spelling app notably, positively affects kids’ reading ability, English pronunciation, helps to build a bigger vocabulary bank and improve typing speed. Spelltronaut : Primary Spelling app uses the concept of working at your own pace. Therefore the app is designed in a way to support kids’ learning of the national curriculum’s statuory, non-statuory and other English spelling words properly. Keep an eye out for new exciting updates including aspects of 11+ verbal reasoning and 11+ spellings! Feel free to give us feedback to help us improve.
Screenshots
Verdict
The clearest difference is rating: NumBots at 4.7 against Spelltronaut's 2.7. NumBots also leads on review sentiment (66% vs 33%) and ratings volume (322 vs 3). Spelltronaut's advantage is update cadence (every 2 days vs every 2 months) and iOS requirement (10.0 vs 15.0). On price, ads, in-app purchases and monetization model 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.
NumBots holds the better App Store score, 4.7 against 2.7. That said, the two scores are not equally well evidenced: NumBots has 322 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 66% of NumBots's written reviews are positive against 33% of Spelltronaut's.
NumBots ships an update every 2 months, Spelltronaut every 2 days. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.
| Parameter | NumBots | Spelltronaut |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (322 ratings) — better | 2.7 (3 ratings) |
| Positive reviews | 66.3% of reviews — better | 33.3% of reviews |
| Number of ratings | 322 — better | 3 |
| Update frequency | Every 2 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 10.0 — better |
| Further details — not scored | ||
| Size | 30 MB | 154 MB |
| Age rating | 4+ | 4+ |
| Developer | Maths Circle Ltd | Ilker Bayraktutan |
Customer experience
NumBots
Spelltronaut
Bugs and requests
NumBots
Reported bugs
5 issues- Coins and stars not tracking correctly
- Login issues across devices
- Keyboard not showing up on tablets
- Levels randomly locked or missing
- App crashing and freezing
Requested features
5 requests- More advanced levels and content
- Ability to skip to appropriate level
- Less emphasis on speed, more on accuracy
- Family account support
- Improved login and persistence
Spelltronaut
Not enough reviews yet to summarise bugs or requests.
In-app purchases
NumBots
No in-app purchases
Spelltronaut
No in-app purchases
Questions
Is NumBots free?
Is Spelltronaut free?
Which has better reviews, NumBots or Spelltronaut?
Do NumBots or Spelltronaut have ads?
Which is updated more often, NumBots or Spelltronaut?
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