NumBots vs RackRush.kids
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.
RackRush.kids
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SPELL WORDS. BUILD SKILLS. HAVE FUN. RackRush Kids is an educational word game for ages 4-12. Kids build words from letter racks, play quick rounds, and collect rewards while they improve spelling and vocabulary. COME BACK EVERY DAY • Benny the Bear greets your child by name and shows what's waiting • A new gift every day, with stickers and hint coins • Monthly sticker sets, such as Space Explorers and Ocean Friends • Daily Goal, Word of the Day and a daily streak that can be saved once a week • Optional daily reminder, set by a parent WHAT KIDS CAN PLAY • Practice: solo games against friendly bots • Islands: 30 levels with stars and sticker rewards • Party: pass-and-play, or a party with nearby devices • Online: 1v1 matches (turned on by a parent) REWARDS • 30 island stickers, plus monthly sticker sets • 12 avatars to unlock • 23 badges, from first words to 100-day streaks • A weekly goal that pays out hint coins AGE-BASED DIFFICULTY • Ages 4-6: 5 letters, shorter rounds • Ages 7-9: 6 letters • Ages 10-12: 7 letters • Parent option: Extra Challenge (+1 letter for ages 7 and up) PARENT FEATURES • PIN-protected parental controls • Turn online play and the daily reminder on or off • Progress report: games, words, accuracy and daily status • Privacy policy and support links KIDS SAFETY • No ads • No in-app purchases • No open chat between children • Core gameplay works offline Download RackRush Kids and make word practice a daily habit.
Screenshots
Verdict
The clearest difference is update cadence: NumBots at every 5 weeks against RackRush.kids's every 8 months. NumBots also leads on iOS requirement (13.0 vs 17.0). 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. Neither carries in-app purchases, so what you see is what you pay.
NumBots ships an update every 5 weeks, RackRush.kids every 8 months. The most recent releases landed on October 29, 2026 and October 14, 2026 respectively.
| Parameter | NumBots | RackRush.kids |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (319 ratings) — better | — |
| Positive reviews | 66.5% of reviews | — |
| Number of ratings | 319 — better | — |
| Update frequency | Every 5 weeks — better | Every 8 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 31 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | Maths Circle Ltd | Btltech Ltd |
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
RackRush.kids
Not enough reviews yet to summarise bugs or requests.
In-app purchases
NumBots
No in-app purchases
RackRush.kids
No in-app purchases
Questions
Is NumBots free?
Is RackRush.kids free?
Do NumBots or RackRush.kids have ads?
Which is updated more often, NumBots or RackRush.kids?
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