Comparison

Sumdog vs StarPlanner

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

StarPlanner

Features
Read full description

Turn “maybe the sky is worth watching tonight” into a clear plan. StarPlanner picks the best target, shows the clearest viewing window, and explains where to look. Spend less time searching and more time under the stars. YOUR NEXT NIGHT UNDER THE STARS • One best target for tonight, without the noise • Clouds, darkness, and moonlight for your chosen city • A short saved plan containing only events you care about • Meteor showers, Moon phases, eclipses, and planets KNOW WHERE TO LOOK • Calculated positions for the Moon, planets, and bright objects • Direction, best time, and practical tips for every event • A time-shifting sky map and live finder PLAN IT. REMEMBER IT. • A 12-month astronomy calendar • Local reminders, a widget, and peak countdowns • A private observing journal with export • Red night mode that stays comfortable in the dark CHECK THE CONDITIONS • NOAA Kp forecast for aurora activity • The current ISS position with honest limitations • A 16-day cloud forecast for your location No account, ads, trackers, or analytics SDKs. Your journal and settings stay on your device, and you can choose a city without granting GPS access. Background stars are schematic. StarPlanner is not an AR planetarium or a visible ISS-pass predictor. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Sumdog4 screens
StarPlanner4 screens

Verdict

The call

The clearest difference is update cadence: StarPlanner at fortnightly against Sumdog's every 2 months. Sumdog's advantage is iOS requirement (15.0 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Sumdog sells 1 in-app purchase, starting at $8.99 per month and StarPlanner sells 6 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Sumdog ships an update every 2 months, StarPlanner fortnightly. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

Scorecard2 real differences · 8 level
Sumdog versus StarPlanner: the parameters behind the verdict, then further details
ParameterSumdogStarPlanner
PriceFreeFree
Rating4.2 (1.6K ratings) — better—
Positive reviews63.7% of reviews—
Number of ratings1.6K — better—
Update frequencyEvery 2 monthsFortnightly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.0
Further details — not scored
Size135 MB3 MB
Age rating4+4+
DeveloperSumdog Ltd.PETRO VAKULENKO

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

StarPlanner

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Sumdog

Subscriptions1
  • Family Membership7 Days trial$8.991 Month
6 purchases

StarPlanner

Subscriptions2
  • StarPlanner Pro Monthly7 Days trial$0.991 Month
  • StarPlanner Pro Yearly7 Days trial$9.991 Year
One-time4
  • Support Development — Small$2.99
  • Medium Support Tip$4.99
  • Large Support Tip$9.99
Show 1 more
  • StarPlanner Pro (Lifetime)$16.99

Questions

Is Sumdog free?
Sumdog is free to download, with in-app purchases available.
Is StarPlanner free?
StarPlanner is free to download, with in-app purchases available.
Do Sumdog or StarPlanner have ads?
Neither Sumdog nor StarPlanner shows ads.
Which is updated more often, Sumdog or StarPlanner?
Sumdog ships an update every 2 months, and StarPlanner fortnightly. Most recently, Sumdog was updated on October 26, 2026 and StarPlanner on October 24, 2026.

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