Comparison

Add & Subtract vs Happy Learn 香港

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

Head to head
About

Add & Subtract

This app helps young children develop an interest in mathematics through interactive games. It uses visual aids and engaging scenes to teach basic addition and subtraction concepts, reinforcing learning with positive feedback.

Highlights
  • Interactive learning scenes
  • Visual representation of numbers
  • Addition and subtraction practice
  • Positive reinforcement for correct answers
  • Engaging animal characters
Features
Read full description

XiaoPack · Little Bag, Big Discoveries. Discover addition and subtraction with playful animal friends! Fish, butterflies, chicks and ducks arrive and leave one at a time, helping children see what each equation means. Questions unfold automatically: children simply tap one of four picture-number answers. A correct answer brings a celebration and the next question. • Random addition and subtraction with operands up to 10; addition results can reach 20. • Four hand-painted worlds, animated animals and cartoon number pictures. • Landscape play on iPhone and iPad. • Ten languages: English, Simplified Chinese, Traditional Chinese, Japanese, Korean, French, Italian, Portuguese, Spanish and Indonesian. The app uses your iOS app language preference, with English as the fallback. • Offline play, no advertising and no app account required. The fish world is free. One optional, permanent in-app purchase unlocks the other three worlds together. Purchase and restore actions are protected by a four-choice maths question for parents. The price is displayed in your local App Store currency.

About

Happy Learn 香港

Features
Read full description

"Practice makes perfect" For kids who speak Cantonese, this app will help your child practice what they have learnt from learning classes. It has three categories: - Mathematics - English - Cantonese For Mathematics, it will have basic addition and subtraction. Practice questions can be printed out so they can practice with a pencil. Each question will have a voice output so that they can listen to the question as well. For English, you can trace English letters, name objects, and recognise words. It uses speech recognition, so that it will be fun. For Cantonese, you can recognise characters and objects. There is a parents section where you can see how many questions are answered correctly. For each correct answer, there is a point added. Your child can use these points as a reward. For example, they can redeem as YouTube minutes or to eat some candy. There is a section for the parent to record encouraging messages when they answer correctly or incorrectly. This will give extra motivation for them to practice more.

Screenshots

Add & Subtract4 screens
Happy Learn 香港4 screens

Verdict

The call

The clearest difference is in-app purchases: Happy Learn 香港 at none against Add & Subtract's 1. Happy Learn 香港 also leads on update cadence (monthly vs every 44 months) and iOS requirement (15.6 vs 17.0). On price, ads 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. Add & Subtract sells 1 one-off in-app purchase. Happy Learn 香港 asks for nothing beyond the download.

UpkeepUpdate frequency

Add & Subtract ships an update every 44 months, Happy Learn 香港 monthly. The most recent releases landed on November 6, 2026 and October 30, 2026 respectively.

Scorecard3 real differences · 6 level
Add & Subtract versus Happy Learn 香港: the parameters behind the verdict, then further details
ParameterAdd & SubtractHappy Learn 香港
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 44 monthsMonthly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.6 — better
Further details — not scored
Size55 MB34 MB
Age rating4+4+
Developer丽东 陈Johnny Tam

In-app purchases

1 purchases

Add & Subtract

One-time1
  • All Three Worlds$1.99
None

Happy Learn 香港

No in-app purchases

Questions

Is Add & Subtract free?
Add & Subtract is free to download, with in-app purchases available.
Is Happy Learn 香港 free?
Happy Learn 香港 is free to download, with no in-app purchases.
Do Add & Subtract or Happy Learn 香港 have ads?
Neither Add & Subtract nor Happy Learn 香港 shows ads.
Which is updated more often, Add & Subtract or Happy Learn 香港?
Add & Subtract ships an update every 44 months, and Happy Learn 香港 monthly. Most recently, Add & Subtract was updated on November 6, 2026 and Happy Learn 香港 on October 30, 2026.

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