Comparison

RoboTone. vs Kid's Card Calc

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

Head to head
About

RoboTone.

This app helps children develop absolute listening skills through interactive musical challenges. Players learn to identify tones by playing a virtual piano and then compete against a "robo" by selecting the correct notes. Settings allow customization of tones and instruments.

Highlights
  • Absolute listening skill development
  • Interactive musical challenges
  • Virtual piano gameplay
  • Tone identification battles
  • Customizable tones and instruments
Features
Read full description

Hit the tones, beat the robo! RoboTone is an application to strengthen absolute listening skill for your kids, especially grade school students. They say, it's difficult to get the absolute listening skill after grown up, so try this app before you getting old. First of all, play the piano as you like to listen and be familiar with the tones from this app. Next, tap the battle button and do the battle. Select the tone(s) you listen, press the answer to go! You are correct, the robo's power deceases. It's time to beat the robo! To tap the setting button, you can change the tones number and instrument.

About

Kid's Card Calc

Features
Read full description

Two number cards. One answer. A simple rhythm that helps children enjoy mental math. Kids Card Calculation is a focused arithmetic practice app for early elementary learners. Choose an operation and a level, answer 10 to 52 questions, and review completion time and mistakes when finished. PRACTICE ALL FOUR OPERATIONS • Addition: Add each new number to the running total • Subtraction: Subtract each new number from the starting total • Multiplication: Solve a new multiplication question each time • Division: Practice problems that divide evenly, with no remainders FOUR LEVELS THAT GROW STEP BY STEP • Level 1: Numbers 1–5 / 10 questions • Level 2: Numbers 1–10 / 20 questions • Level 3: Numbers 1–10 / 40 questions • Level 4: Numbers 1–13 / 52 questions Start with a short session, then move up when your child is ready. Each operation adjusts the problem range to suit the selected level. SEE PROGRESS CLEARLY • Check time and mistakes after every session • Review personal bests by operation and level • Keep recent results on the device DESIGNED FOR CHILDREN AND FAMILIES • Large number cards and an easy-to-use keypad • Calm, focused design without distracting game elements • No ads • No subscriptions or in-app purchases • No account required • Core practice works offline GOOD FOR • Short daily math practice • Building mental arithmetic fluency • Reviewing addition, subtraction, multiplication, and division • Home learning and school-break review Help your child turn “I solved it!” into lasting confidence—one question at a time. TERMS OF USE (APPLE STANDARD EULA) https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

RoboTone.4 screens
Kid's Card Calc4 screens

Verdict

The call

The clearest difference is price: RoboTone. at Free against Kid's Card Calc's $1.99. RoboTone. also leads on in-app purchases (none vs 3). Kid's Card Calc's advantage is ads (none vs shown) and update cadence (every 3 weeks vs every 4 months). On 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

RoboTone. is free to download; Kid's Card Calc costs $1.99 up front. Kid's Card Calc sells 3 in-app purchases, starting at $1.99 per month. RoboTone. asks for nothing beyond the download.

UpkeepUpdate frequency

RoboTone. ships an update every 4 months, Kid's Card Calc every 3 weeks. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

Scorecard4 real differences · 6 level
RoboTone. versus Kid's Card Calc: the parameters behind the verdict, then further details
ParameterRoboTone.Kid's Card Calc
PriceFree — better$1.99
Rating1.0 (1 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 4 monthsEvery 3 weeks — better
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better16.4
Further details — not scored
Size64 MB39 MB
Age rating4+4+
DeveloperMASAHIRO MIZUTANIsheeplab LLC

In-app purchases

None

RoboTone.

No in-app purchases

3 purchases

Kid's Card Calc

Subscriptions2
  • Premium Plan (Monthly)$1.991 Month
  • Premium Plan (Annual)$5.991 Year
One-time1
  • Premium Plan$0.99

Questions

Is RoboTone. free?
RoboTone. is free to download, with no in-app purchases.
Is Kid's Card Calc free?
Kid's Card Calc costs $1.99, and also offers in-app purchases.
Do RoboTone. or Kid's Card Calc have ads?
RoboTone. shows ads; Kid's Card Calc does not.
Which is updated more often, RoboTone. or Kid's Card Calc?
RoboTone. ships an update every 4 months, and Kid's Card Calc every 3 weeks. Most recently, RoboTone. was updated on November 1, 2026 and Kid's Card Calc on October 30, 2026.

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