Comparison

Kuku Robo vs Clock Challenge

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

Head to head
About

Kuku Robo

Master multiplication with a Japanese method called 'Kuku'. This app offers various levels ('Dan') to practice and improve your math skills. It's designed for consistent effort to build a strong foundation in mathematics.

Highlights
  • Learn Kuku multiplication method
  • Practice with different 'Dan' levels
  • Improve math skills
  • Track progress through practice
  • Designed for consistent effort
Features
Read full description

Let’s learn the multiplication method called 'Kuku'. This is the secret why Japanese guys have a good track record of mathematics. It's important to keep trying on the Kuku, so this app is for you. You can choose several rows called 'Dan' as you like. Have fun with Kuku!

About

Clock Challenge

Features
Read full description

Clock Challenge is a great app for kindergarten to 2nd grade children to learn and practice telling time. Your child will learn how to tell time on analogue clocks in various ways using minutes past/after, minutes to/before and quarter past/to. In Telling Time and Long Hand Quiz, your child will compete against a gopher in reading the clock. With every incorrect answer, the gopher gets points. In Clock Challenge, the egg will hatch and grow as their score goes up. Also, a bonus egg is included to encourage your child to practice more. This is a fun game to improve your child's time telling skills. **Plus a play history report and setup option for a parent or teacher to control the level of difficulty (i.e, setup to ask a question only hours, half an hour, quarters or nearest 5 minutes), setup to show minutes (0,5,10,15,…55) on the clock face and customize the number of questions and number of tries to match your child's level. **All words have been recorded by professional voice talent. *** If you have any questions or problems related to our app, please email us at playsmart.kids@gmail.com. We are willing to assist you.

Screenshots

Kuku Robo4 screens
Clock Challenge4 screens

Verdict

The call

The clearest difference is price: Kuku Robo at Free against Clock Challenge's $0.99. Kuku Robo also leads on update cadence (every 3 months vs every 15 months). Clock Challenge's advantage is ads (none vs shown). On in-app purchases, 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

Kuku Robo is free to download; Clock Challenge costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Kuku Robo ships an update every 3 months, Clock Challenge every 15 months. The most recent releases landed on October 23, 2026 and October 18, 2026 respectively.

Scorecard3 real differences · 5 level
Kuku Robo versus Clock Challenge: the parameters behind the verdict, then further details
ParameterKuku RoboClock Challenge
PriceFree — better$0.99
Positive reviews0.0% of reviews—
Update frequencyEvery 3 months — betterEvery 15 months
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supported—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.014.2 — better
Further details — not scored
Size57 MB59 MB
Age rating4+4+
DeveloperMASAHIRO MIZUTANIJariya Tuantranont

In-app purchases

None

Kuku Robo

No in-app purchases

None

Clock Challenge

No in-app purchases

Questions

Is Kuku Robo free?
Kuku Robo is free to download, with no in-app purchases.
Is Clock Challenge free?
Clock Challenge costs $0.99, with no in-app purchases.
Do Kuku Robo or Clock Challenge have ads?
Kuku Robo shows ads; Clock Challenge does not.
Which is updated more often, Kuku Robo or Clock Challenge?
Kuku Robo ships an update every 3 months, and Clock Challenge every 15 months. Most recently, Kuku Robo was updated on October 23, 2026 and Clock Challenge on October 18, 2026.

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