Comparison

Clock Challenge vs Subtraction Mathematics

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

Head to head
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.

About

Subtraction Mathematics

This math app teaches children multi-digit subtraction with step-by-step guidance and positive reinforcement. It adapts to the student's learning pace, offering practice for beginners and review for older students. Features include AI handwriting recognition and progress monitoring for parents and teachers.

Highlights
  • Multi-digit subtraction with borrowing
  • Step-by-step instructions
  • AI handwriting recognition
  • Progress monitoring with color-coded feedback
  • Customizable digit combinations
  • Encouragement-based learning
Features
Read full description

SUBTRACTION is a smart math app that teaches children how to subtract multi-digit numbers together. It monitors what the student knows and where they still need practice. It teaches step-by-step how to subtract small numbers and then progresses to multi-borrow subtraction. SUBTRACTION is encouragement-based providing positive reinforcement for the student's effort both visually and auditorily. The student, parents, and teachers can all quickly see where the student needs more practice in a color-coded format. Go from simple math facts like 3-1=2 to more difficult equations such as 904-795, with the app showing you the correct answer if you make a mistake. Full customization is possible including choosing the specific digit combinations you want to review or practice. Excellent for beginners just learning subtraction or a quick review for slightly older students. Students practice writing numbers too. AI converts the student's handwritten numbers into digits. Single-digit subtraction is free. Multi-digit subtraction with borrowing along with custom colors, specific numbers to learn, different character voices, and background music requires an in-app purchase. FEATURES ► Simple and visually appealing ► Make it as easy or hard as you want + 1-3 digit numbers + without borrowing + with borrowing + only practice certain digits or all of them ► Step-by-step instructions if a student wants + forces precise digit order into the correct fields + makes it impossible to move on with a wrong digit + with visual instructions for each entry ► Animated character with encouragement + completely optional for older students + 3 different voices ► Complete customization + specific numbers included or excluded + color design of screens + option to show the correct answer in case of an error + choices of optional background music + sounds/vibrations on right/wrong answers + moves to the next problem if the correct answer is input ► Intelligent + Remembers mistakes and helps practice for mastery ► AI-based handwriting Recognition + write the answers + great for practicing handwriting ► Feedback / Monitoring + Positive/Negative sound reinforcement + Summary of progress in both table and graph form + Easy for student/parent/teacher to monitor progress ► NO ADS, ALL FEATURES ENABLED TERMS & CONDITIONS: http://www.programisprime.com/subtractionterms.html PRIVACY POLICY: http://www.programisprime.com/subtractionprivacy.html WE LOVE FEEDBACK We appreciate your feedback. Please email us at support@programisprime.com with any suggestions or questions. If you are happy with this update, please let us know by rating and reviewing us in the App Store! © 2023 Programis Prime LLC

Screenshots

Clock Challenge4 screens
Subtraction Mathematics4 screens

Verdict

The call

The clearest difference is price: Subtraction Mathematics at Free against Clock Challenge's $0.99. Subtraction Mathematics also leads on update cadence (fortnightly vs every 15 months). Clock Challenge's advantage is in-app purchases (none vs 1) and iOS requirement (14.2 vs 16.0). On 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

Subtraction Mathematics is free to download; Clock Challenge costs $0.99 up front. Subtraction Mathematics sells 1 one-off in-app purchase. Clock Challenge asks for nothing beyond the download.

UpkeepUpdate frequency

Clock Challenge ships an update every 15 months, Subtraction Mathematics fortnightly. The most recent releases landed on October 18, 2026 and October 24, 2026 respectively.

Scorecard4 real differences · 6 level
Clock Challenge versus Subtraction Mathematics: the parameters behind the verdict, then further details
ParameterClock ChallengeSubtraction Mathematics
Price$0.99Free — better
Rating—4.3 (27 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—27 — better
Update frequencyEvery 15 monthsFortnightly — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS14.2 — better16.0
Further details — not scored
Size59 MB172 MB
Age rating4+4+
DeveloperJariya TuantranontPROGRAMIS PRIME LLC

In-app purchases

None

Clock Challenge

No in-app purchases

1 purchases

Subtraction Mathematics

One-time1
  • Get All Features$3.99

Questions

Is Clock Challenge free?
Clock Challenge costs $0.99, with no in-app purchases.
Is Subtraction Mathematics free?
Subtraction Mathematics is free to download, with in-app purchases available.
Do Clock Challenge or Subtraction Mathematics have ads?
Neither Clock Challenge nor Subtraction Mathematics shows ads.
Which is updated more often, Clock Challenge or Subtraction Mathematics?
Clock Challenge ships an update every 15 months, and Subtraction Mathematics fortnightly. Most recently, Clock Challenge was updated on October 18, 2026 and Subtraction Mathematics on October 24, 2026.

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