Blue vs NumBots
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Blue
This app allows children to create and execute algorithms for a robot. It offers step-by-step and drag-and-drop programming, with features like repeats and 45-degree turns. Challenge modes introduce obstacles and limited controls for added difficulty.
- Step-by-step programming
- Drag and drop interface
- Repeat commands
- 45-degree turns
- Obstacle challenges
- Customizable voice commands
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Blue-Bot is one of the many loved members of the TTS Floor Robot family. The Blue-Bot app enables you to write an algorithm, send it and then Blue-Bot will follow your instructions. There are numerous features, which make writing algorithms both fun and educational. Use explore mode to develop algorithms: Step by step programming. Drag and drop programming. Include repeats to add efficiency. Program 45 degree turns. Challenge mode will add complexity into the algorithm: Blue-Bot will add random obstacles, adding complexity to the algorithm needed One or even two directional buttons can be removed Children can also record themselves saying a command and can assign it to a button on Blue-Bot. As the algorithm progresses, they will hear themselves giving the instructions. Please note to control a Blue-Bot floor robot your device must have Bluetooth.
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.
Screenshots
Verdict
The clearest difference is rating: NumBots at 4.7 against Blue's 3.7. NumBots also leads on review sentiment (66% vs 43%) and ratings volume (322 vs 7). Blue's advantage is iOS requirement (12.4 vs 15.0). On price, update cadence, 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.
NumBots holds the better App Store score, 4.7 against 3.7. That said, the two scores are not equally well evidenced: NumBots has 322 ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 43% of Blue's written reviews are positive against 66% of NumBots's.
Blue ships an update every 3 months, NumBots every 2 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.
| Parameter | Blue | NumBots |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (7 ratings) | 4.7 (322 ratings) — better |
| Positive reviews | 42.9% of reviews | 66.3% of reviews — better |
| Number of ratings | 7 | 322 — better |
| Update frequency | Every 3 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.4 — better | 15.0 |
| Further details — not scored | ||
| Size | 130 MB | 30 MB |
| Age rating | 4+ | 4+ |
| Developer | TTS Group Limited | Maths Circle Ltd |
Customer experience
Blue
NumBots
Bugs and requests
Blue
Not enough reviews yet to summarise bugs or 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
In-app purchases
Blue
No in-app purchases
NumBots
No in-app purchases
