Comparison

Happy Kitty Calculator vs WallJoy

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

Head to head
About

Happy Kitty Calculator

Features
Read full description

This is a cat-themed calculator featuring munchkin cats, Persian cats, ragdoll cats, and various AI-designed cats. Combined with exquisite hand-drawn designs, it makes every use delightful. The calculator not only looks adorable but also ensures precise calculations for every input. The button size is designed for quick calculations, ensuring ease of use. Users can customize backgrounds with options like landscapes, rooms, streets, and forests. The display area offers various styles and colors, along with adorable themed buttons and background colors, allowing users to create their own personalized, cute calculator. Additionally, we periodically release updates to add new content and features, ensuring users can enjoy the latest and most exciting changes! By using this application, you agree to our Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.termsfeed.com/live/f5f24d28-ed7f-4755-80c8-20a300f6a11f Terms of Service: https://docs.google.com/document/d/1WteUIp6cT0xQVK86647jO0a2gQvwk-pJ7jnqMJqM5kI/edit?tab=t.0#heading=h.y4qd89gjlri Contact the Development Team t47320@gmail.com

About

WallJoy

Explore millions of high-quality, high-resolution wallpapers across numerous categories. Discover daily picks, save your favorites, and find the perfect background with powerful search tools. Enjoy a clean, ad-free experience with this free utility.

Highlights
  • Millions of HD wallpapers
  • Smart categories
  • Daily fresh recommendations
  • Powerful keyword search
  • One-tap save
  • Personal favorites collection
Features
Read full description

WallJoy โ€” Discover Beautiful Wallpapers Millions of high-quality wallpapers at your fingertips. From breathtaking landscapes to stunning cityscapes, from starry skies to delicate flowers โ€” find the perfect wallpaper that speaks to you. FEATURES โ—† HD Quality โ€” All wallpapers are high-resolution, perfectly optimized for portrait display โ—† Smart Categories โ€” Nature, City, Animals, Flowers, Ocean, Starry Sky & 12 categories to explore โ—† Daily Picks โ€” Fresh popular wallpapers recommended every day โ—† Powerful Search โ€” Search millions of images with any keyword โ—† One-Tap Save โ€” Save your favorite wallpapers to Photos instantly โ—† Favorites โ€” Tap the heart to build your personal wallpaper collection WHY WALLJOY โ—‡ 100% Free โ€” All wallpapers are free to download and use โ—‡ No Ads โ€” Clean, distraction-free browsing experience โ—‡ Multi-Language โ€” English, Simplified Chinese, Traditional Chinese โ—‡ Privacy First โ€” No personal data collected, photo access only needed when saving IMAGE SOURCE All wallpaper images are from the Pixabay open platform, licensed under the Pixabay License, free for personal and commercial use. Love WallJoy? Leave us a review โ€” your support keeps us going!

Screenshots

Happy Kitty Calculator4 screens
WallJoy3 screens

Verdict

The call

The clearest difference is price: Happy Kitty Calculator at Free against WallJoy's $0.99. Happy Kitty Calculator also leads on update cadence (every 3 weeks vs every 2 months). WallJoy's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Happy Kitty Calculator is free to download; WallJoy costs $0.99 up front. Happy Kitty Calculator sells 1 one-off in-app purchase. WallJoy asks for nothing beyond the download.

UpkeepUpdate frequency

Happy Kitty Calculator ships an update every 3 weeks, WallJoy every 2 months. The most recent releases landed on October 25, 2026 and October 8, 2026 respectively.

Scorecard3 real differences ยท 5 level
Happy Kitty Calculator versus WallJoy: the parameters behind the verdict, then further details
ParameterHappy Kitty CalculatorWallJoy
PriceFree โ€” better$0.99
Positive reviewsโ€”100.0% of reviews
Update frequencyEvery 3 weeks โ€” betterEvery 2 months
AdsNoNo
In-app purchasesYesNo โ€” better
Monetizationโ€”Paid
DevicesiPhone, iPod โ€” betteriPhone
Requires iOS15.6 โ€” better16.0
Further details โ€” not scored
Size59 MB6 MB
Age rating4+4+
DeveloperHUA-TENG HUANGxiaolin jiang

In-app purchases

1 purchases

Happy Kitty Calculator

One-time1
  • One-time purchase.$2.99
None

WallJoy

No in-app purchases

Questions

Is Happy Kitty Calculator free?
Happy Kitty Calculator is free to download, with in-app purchases available.
Is WallJoy free?
WallJoy costs $0.99, with no in-app purchases.
Do Happy Kitty Calculator or WallJoy have ads?
Neither Happy Kitty Calculator nor WallJoy shows ads.
Which is updated more often, Happy Kitty Calculator or WallJoy?
Happy Kitty Calculator ships an update every 3 weeks, and WallJoy every 2 months. Most recently, Happy Kitty Calculator was updated on October 25, 2026 and WallJoy on October 8, 2026.

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