Comparison

Sumdog vs NumBots

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Sumdog

This app offers personalized math and spelling practice for children aged 5-14 through engaging games and adaptive learning. It uses diagnostic tests to tailor learning journeys and provides virtual rewards to motivate students. Parents can set up accounts for home use or connect to school-assigned work.

Highlights
  • Personalized adaptive learning
  • Engaging single and multiplayer games
  • Thousands of standards-aligned questions
  • Virtual coin rewards system
  • 3D avatar and house personalization
  • Diagnostic assessment
Features
Read full description

Make learning fun with Sumdog! Sumdog delivers highly engaging personalized practice for math and spelling, both in-school and at home. Suitable for children aged 5-14, our adaptive learning games and online rewards motivate children to learn and encourages regular practice. When children first use Sumdog, we run a short diagnostic test to provide a snapshot of their learning and areas for development. Our adaptive learning engine then uses the outcomes of the diagnostic to ensure each child’s starting point on Sumdog is at the right level. From this point, our sophisticated adaptive algorithms create a personalized learning journey based for each child based on their progress. - Over 30 engaging single and multiplayer games - Thousands of standards-aligned questions designed to consolidate and extend in-class learning - Virtual coin rewards to motivate children to learn - A 3D avatar, house and garden for children to personalize “I never thought an online program could do so much in such short bursts of time.” D. Hendershot, West Elementary, Kansas, US. Account set-up If your child has an account from school: Your child can log in with their details from their school. They’ll then be able to access any work that has been set by their teachers. If your child does not have an account from school: In the Sumdog app, parents can purchase a family plan covering up to 3 children. Once you’ve done this, you’ll create logins for your child to use the app. This gives them access to Sumdog’s games, and thousands of math, spelling and grammar questions. Subscription details: Your subscription starts with a free trial period and then changes to a subscription from $8.99 per month. No commitment period. Download the app and get started today! The amount will be deducted automatically every month via your Apple account. As long as the "Automatic renewal" feature is not disabled via the Apple account settings on your device, the subscription will automatically renew every month no later than 24 hours before your subscription period expires. Sumdog Terms: https://learn.sumdog.com/en-us/about-us/terms-of-use Sumdog Privacy: https://learn.sumdog.com/en-us/about-us/privacy-policy

About

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.

Highlights
  • Master mental addition
  • Master mental subtraction
  • Build understanding
  • Develop recall
  • Achieve fluency
  • Transition from counting to calculating
Features
Read full description

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

Sumdog4 screens
NumBots4 screens

Verdict

The call

The clearest difference is rating: NumBots at 4.7 against Sumdog's 4.2. NumBots also leads on in-app purchases (none vs 1) and iOS requirement (13.0 vs 15.0). Sumdog's advantage is ratings volume (1.6K vs 304). On price, review sentiment, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Sumdog sells 1 in-app purchase, starting at $8.99 per month. NumBots asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

NumBots holds the better App Store score, 4.7 against 4.2. That said, the two scores are not equally well evidenced: Sumdog has 1.6K ratings behind it against 304, so its average is the more settled of the two. Written reviews point the same way: 64% of Sumdog's written reviews are positive against 66% of NumBots's.

UpkeepUpdate frequency

Sumdog ships an update every 2 months, NumBots every 5 weeks. The most recent releases landed on September 22, 2026 and September 21, 2026 respectively.

Scorecard5 real differences · 5 level
Sumdog versus NumBots: the parameters behind the verdict, then further details
ParameterSumdogNumBots
PriceFreeFree
Rating4.2 (1.6K ratings)4.7 (304 ratings) — better
Positive reviews64.0% of reviews66.5% of reviews — better
Number of ratings1.6K — better304
Update frequencyEvery 2 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size134 MB31 MB
Age rating4+4+
DeveloperSumdog Ltd.Maths Circle Ltd

Customer experience

Sumdog

All ratings1,553 ratings
Positive78.3%
Neutral4.9%
Negative16.8%
Written reviews353 reviews
Positive64.0%
Neutral10.2%
Negative25.8%

NumBots

All ratings304 ratings
Positive93.1%
Neutral2.3%
Negative4.6%
Written reviews164 reviews
Positive66.5%
Neutral7.3%
Negative26.2%

User reviews

Sumdog

From 1.6K App Store ratings

What we love

  • 🎮 Fun and engaging games
  • 🏆 Competitive leaderboards
  • 🏠 Customizable avatar and house
  • 📚 Helps with learning math, spelling, and grammar
  • 🏫 Useful for schools and teachers

Room to improve

  • 🐛 Glitches and bugs
  • 🕰️ Slow loading times
  • 🔒 Limited access to premium features without subscription
  • 🤖 Weird or unappealing 3D character models
  • 🔍 Lack of instructions for some games

NumBots

From 304 App Store ratings

What we love

  • 👍 Great for learning math
  • 🚀 Fun and engaging
  • 💡 Helpful for improving math skills
  • 💡 Customizable robot feature
  • 👍 Useful for kids aged 4-7

Room to improve

  • 🐛 Glitches and bugs
  • 🔍 Unclear progression system
  • ⏱️ Strict time limits
  • 🤔 Repetitive levels
  • 🤔 Not challenging enough for older kids

Bugs and requests

Sumdog

Reported bugs

4 issues
  • Flower Defenders game not working properly
  • Goalz game not registering shots correctly
  • Sudden logout issues
  • Incompatibility with certain devices or browsers

Requested features

5 requests
  • Add more free games
  • Bring back old 2D games
  • Allow interaction with house and garden items
  • Improve multiplayer functionality
  • Add more customization options for avatar and house

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

1 purchases

Sumdog

Subscriptions1
  • Family Membership7 Days trial$8.991 Month
None

NumBots

No in-app purchases

Questions

Is Sumdog free?
Sumdog is free to download, with in-app purchases available.
Is NumBots free?
NumBots is free to download, with no in-app purchases.
Which has better reviews, Sumdog or NumBots?
NumBots is rated higher. Sumdog averages 4.2 out of 5 from 1.6K ratings, while NumBots averages 4.7 from 304 ratings.
Do Sumdog or NumBots have ads?
Neither Sumdog nor NumBots shows ads.
Which is updated more often, Sumdog or NumBots?
Sumdog ships an update every 2 months, and NumBots every 5 weeks. Most recently, Sumdog was updated on September 22, 2026 and NumBots on September 21, 2026.

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