Comparison

Simple Add Subtract vs Hello Kitty

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

Head to head
About

Simple Add Subtract

Features
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This is a brain exercise game that does only simple adding and subtracting with maximum 2 digits. A result and 36 numbers are given. Find the numbers that add up equal to the given result. there are 18 sets or combinations for "add 2 numbers", 12 for "add 3 numbers", 9 for "add 4 numbers" and 6 for "add 6 numbers". In a relax mood, use adding and subtracting to find the right set or combination. This will keep human brain in light function with calculation and get aways from any other things. The "Live Result" and the "Display Hint" button are off at default. They can be turned on at the setting scene if it is needed. The letter and background colour of the 36 number boxes can be changed at the setting scene.

About

Hello Kitty

Help adorable kittens get ready for bed by engaging in fun activities like sorting photos and drawing. This mini-game makes bedtime routines enjoyable for children, turning preparation for sleep into a playful experience.

Highlights
  • Help kittens fall asleep
  • Sorting photos
  • Drawing activities
  • Bedtime stories
  • Educational mini-games
Features
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Welcome to a new exciting game! Cats can’t fall asleep without your help. Cute kittens like to help their mother, but there is no time to play after cleaning. Because house cleaning takes a lot of time! To make this process interesting, friends watch cartoons and tell different stories. But Hello Kitty and her friends are not just telling bedtime stories. A player can try sorting photos or drawing here. Help cats to prepare for sleeping! Hello Kitty with friends are ready to see wonderful dreams! Our educational games are available in market absolutely for free! Please read our Privacy policy: https://policy.psvgamestudio.com/privacy_policy_appstore_clear_invest.html and Terms of use: https://policy.psvgamestudio.com/terms_of_use_appstore_clear_invest.html

Screenshots

Simple Add Subtract4 screens
Hello Kitty4 screens

Verdict

The call

The clearest difference is in-app purchases: Simple Add Subtract at none against Hello Kitty's 5. Hello Kitty's advantage is update cadence (every 2 months vs every 42 months) and iOS requirement (15.0 vs 18.6). 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. Hello Kitty sells 5 in-app purchases, starting at $1.99 per 7 days. Simple Add Subtract asks for nothing beyond the download.

UpkeepUpdate frequency

Simple Add Subtract ships an update every 42 months, Hello Kitty every 2 months. Both last shipped on November 3, 2026.

Scorecard3 real differences · 7 level
Simple Add Subtract versus Hello Kitty: the parameters behind the verdict, then further details
ParameterSimple Add SubtractHello Kitty
PriceFreeFree
Rating—4.5 (643 ratings) — better
Positive reviews—77.5% of reviews
Number of ratings—643 — better
Update frequencyEvery 42 monthsEvery 2 months — better
AdsYesYes
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS18.615.0 — better
Further details — not scored
Size6 MB232 MB
Age rating4+4+
DeveloperHong YuOculist

Bugs and requests

Simple Add Subtract

Not enough reviews yet to summarise bugs or requests.

Hello Kitty

Reported bugs

2 issues
  • Game freezes or crashes on certain devices
  • Saved progress not loading properly

Requested features

3 requests
  • Add more playable characters and customization options
  • Introduce more diverse gameplay activities
  • Reduce the number of advertisements or make them less intrusive

In-app purchases

None

Simple Add Subtract

No in-app purchases

5 purchases

Hello Kitty

Subscriptions3
  • Weekly subscription$1.997 Days
  • Monthly subscription$3.991 Month
  • Annual subscription$7.991 Year
One-time2
  • No ads$1.99
  • Full version + no ads$9.99

Questions

Is Simple Add Subtract free?
Simple Add Subtract is free to download, with no in-app purchases.
Is Hello Kitty free?
Hello Kitty is free to download, with in-app purchases available.
Do Simple Add Subtract or Hello Kitty have ads?
Both Simple Add Subtract and Hello Kitty show ads.
Which is updated more often, Simple Add Subtract or Hello Kitty?
Simple Add Subtract ships an update every 42 months, and Hello Kitty every 2 months. Most recently, Simple Add Subtract was updated on November 3, 2026 and Hello Kitty on November 3, 2026.

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