Comparison

Sumdog vs TurtleDiary

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

TurtleDiary

Interactive educational games, videos, quizzes, and worksheets for K-5 students. Covers math, language, typing, science, and geography to enhance classroom success and retention.

Highlights
  • 500+ educational games
  • 350+ learning videos
  • 500+ online quizzes
  • Interactive math games
  • Language and art games
  • Typing lessons
  • Multiplayer games
Features
Read full description

Our educational apps and games offer interactive educational activities for grades K to 5 presented through games, videos, quizzes, & worksheets. TurtleDiary activities & games enhance retention of material & increase success in the classroom. Educational Activities Games The TurtleDiary App offers 500+ educational games that are fun, learning, interactive & are 100% free to use. Math Games: From basic topics like Addition, Subtraction, Multiplication, & Division, to more complex topics like Geometry, the kids will never stop learning. Language & Art Games: Kids will learn Nouns, Pronouns, Verbs, Adjectives, Adverbs, & other Parts of Speech, mastering grammar skills right here in the app. Typing Games: In today’s world, typing is undoubtedly an essential skill. TurtleDiary includes many keyboarding games for kids that support necessary skills while providing plenty of fun. Multiplayer Games: For the kids who like to compete & challenge their skills, our multiplayer games let them choose to play with their classmates, a friend & anyone else in the world, in a safe environment. Science Games: Our science games are sure to fulfill your child's sense of curiosity. The app offers a vast collection of science games covering such topics as the human body, weather, life cycles, animals, & much more. Geography Games: With map games, the kids will learn the Geography of the US & the World. Students will find maps of the world divided into different regions, so learning is easier, & tasks feel less overwhelming. Videos: 350+ educational videos for kids span a variety of math, science, & language arts topics. Kids will find learning videos categorized by grade level, from preschool to fifth grade. Quizzes 500+ Online quizzes offered in the app enable children from first to fifth grade to become confident in applying learned concepts & receive instant evaluations. Math Quizzes: Each topic like Addition, Subtraction, Multiplication, Division etc. divides into multiple different subtopics, progressing from easy to hard with multiple levels in between. Language & Art Quizzes: The quizzes will help kids learn Nouns, Pronouns, Verbs, Adjectives, Adverbs, Prepositions, Compound Words, Conjunctions etc. Science Quizzes: Show your child how fun science can be! The study materials cover topics like Force, Matter, Motion, Magnet, Earth’s resources, Plants, Animals, Solar System in both engaging & educational ways. Geography Quizzes: Play & Learn quiz on different topics of the world & enhance geographical skills. Typing Lessons: The app offers 3 skill levels - basic, intermediate, & advanced that include multiple lessons in each. The basic level covers touch typing skills with introduction to the QWERTY keyboard. In the intermediate level, the student learns to type basic words & simple sentences. Get started by subscribing and unlock unlimited content:- -Receive new content & games on a regular basis. -Your subscription will auto-renew yearly & your credit card will be charged via your iTunes account. You can cancel at any time from your iTunes account settings. -Annual Family Account will be charged at $69.99. -Annual Teacher Account will be charged at $199.99. -Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. You can view our Privacy Policy & Terms of Use here:- https://www.turtlediary.com/privacy-policy.html https://www.turtlediary.com/terms-&-conditions.html Important Links • Web: https://www.turtlediary.com/ • App: https://bit.ly/3wUk62l • Facebook: https://www.facebook.com/TurtleDiary • Twitter: https://twitter.com/turtlediarycom • Pinterest: https://www.pinterest.com/turtlediary/ • Youtube: https://www.youtube.com/user/turtlediarydotcom

Screenshots

Sumdog4 screens
TurtleDiary4 screens

Verdict

The call

The clearest difference is rating: Sumdog at 4.2 against TurtleDiary's 3.1. Sumdog also leads on review sentiment (64% vs 29%) and ratings volume (1.6K vs 55). TurtleDiary's advantage is iOS requirement (11.0 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Sumdog sells 1 in-app purchase, starting at $8.99 per month and TurtleDiary sells 9 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Sumdog holds the better App Store score, 4.2 against 3.1. That said, the two scores are not equally well evidenced: Sumdog has 1.6K ratings behind it against 55, 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 29% of TurtleDiary's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 11, 2026 and November 2, 2026 respectively.

Scorecard4 real differences · 6 level
Sumdog versus TurtleDiary: the parameters behind the verdict, then further details
ParameterSumdogTurtleDiary
PriceFreeFree
Rating4.2 (1.6K ratings) — better3.1 (55 ratings)
Positive reviews63.7% of reviews — better29.4% of reviews
Number of ratings1.6K — better55
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.011.0 — better
Further details — not scored
Size135 MB306 MB
Age rating4+4+
DeveloperSumdog Ltd.TurtleDiary LLC

Customer experience

Sumdog

All ratings1,556 ratings
Positive78.3%
Neutral4.9%
Negative16.8%
Written reviews361 reviews
Positive63.7%
Neutral10.5%
Negative25.8%

TurtleDiary

All ratings55 ratings
Positive45.5%
Neutral10.9%
Negative43.6%
Written reviews17 reviews
Positive29.4%
Neutral0.0%
Negative70.6%

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

TurtleDiary

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Sumdog

Subscriptions1
  • Family Membership7 Days trial$8.991 Month
9 purchases

TurtleDiary

Subscriptions7
  • Turtlediary Family Monthly Subscription7 Days trial$5.991 Month
  • Turtlediary Enterprise Monthly Subscription7 Days trial$29.491 Month
  • Turtlediary Family Annual Subscription7 Days trial$49.991 Year
Show 4 more
  • Annual Parent Membership7 Days trial$69.991 Year
  • Turtlediary Enterprise Annual7 Days trial$79.991 Year
  • Turtlediary Enterprise Annual7 Days trial$189.991 Year
  • Annual Teacher Membership7 Days trial$199.991 Year
One-time2
  • Turtlediary Family Annual$69.99
  • TurtleDiary Teacher Annual$199.99

Questions

Is Sumdog free?
Sumdog is free to download, with in-app purchases available.
Is TurtleDiary free?
TurtleDiary is free to download, with in-app purchases available.
Which has better reviews, Sumdog or TurtleDiary?
Sumdog is rated higher. Sumdog averages 4.2 out of 5 from 1.6K ratings, while TurtleDiary averages 3.1 from 55 ratings.
Do Sumdog or TurtleDiary have ads?
Neither Sumdog nor TurtleDiary shows ads.
Which is updated more often, Sumdog or TurtleDiary?
Sumdog ships an update every 2 months, and TurtleDiary every 2 months. Most recently, Sumdog was updated on November 11, 2026 and TurtleDiary on November 2, 2026.

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