Comparison

Sumdog vs LINGR App

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

LINGR App

Features
Read full description

LINGR is a discipleship app for all ages, from Elementary age to Bible Scholar. Each day users will receive a Bible insight along with a question (based on difficulty level chosen by user). Answers will return feedback to allow users to gain additional insight into their response. Progress is tracked along the way. LINGR also allows for Group Learning, making it ideal for churches, small groups, or youth groups. Group Leaders will see progress by members, and leaders will also have the ability to send out weekly (automated) challenges that are customizable. If your child doesn't have a phone, no problem! Create as many child accounts as you'd like, and toggle into those accounts to allow your children to partake in the discipleship process. When it comes to God's word and His truth . . . let's LINGR together!

Screenshots

Sumdog4 screens
LINGR App4 screens

Verdict

The call

The clearest difference is in-app purchases: LINGR App at none against Sumdog's 1. LINGR App also leads on update cadence (every 3 weeks vs every 2 months). On price, ads, device support and iOS requirement 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. LINGR App asks for nothing beyond the download.

UpkeepUpdate frequency

Sumdog ships an update every 2 months, LINGR App every 3 weeks. The most recent releases landed on October 20, 2026 and October 1, 2026 respectively.

Scorecard2 real differences · 8 level
Sumdog versus LINGR App: the parameters behind the verdict, then further details
ParameterSumdogLINGR App
PriceFreeFree
Rating4.2 (1.6K ratings) — better—
Positive reviews63.7% of reviews—
Number of ratings1.6K — better—
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better15.1
Further details — not scored
Size134 MB32 MB
Age rating4+4+
DeveloperSumdog Ltd.ABIDING FAITH BIBLE CHURCH

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

LINGR App

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Sumdog

Subscriptions1
  • Family Membership7 Days trial$8.991 Month
None

LINGR App

No in-app purchases

Questions

Is Sumdog free?
Sumdog is free to download, with in-app purchases available.
Is LINGR App free?
LINGR App is free to download, with no in-app purchases.
Do Sumdog or LINGR App have ads?
Neither Sumdog nor LINGR App shows ads.
Which is updated more often, Sumdog or LINGR App?
Sumdog ships an update every 2 months, and LINGR App every 3 weeks. Most recently, Sumdog was updated on October 20, 2026 and LINGR App on October 1, 2026.

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