Apps by Katsuhiko Yao
-
FractionAndProbability
Education
Free
Released Feb 2025
· updated Mar 2025
-
Cafe WiFi Helper
Lifestyle
Free
IAP?
Released May 2026
· updated Jun 2026
-
Make100 - Make 100 Fast
Education
Free
Released Jun 2026
· updated Jul 2026
-
ColumnSteps: Addition
Education
Free
Released Aug 2026
· updated Aug 2026
-
Symmetry Trainer
Education
Free
Released Feb 2026
· updated May 2026
-
GoshimeidesuInSchool
Education
Free
IAP?
Released Sep 2024
· updated Sep 2024
-
QuickEra
Productivity
Free
Released Feb 2021
· updated Jan 2025
-
RemoveParentheses
Education
Free
Released Jul 2024
· updated Jul 2024
-
PercentTraining
Education
Free
IAP?
Released Apr 2025
· updated Apr 2025
-
MultipleClimbing
Education
Free
IAP?
Released Aug 2025
· updated Aug 2025
-
RemoveCoefficient
Education
Free
Released Jun 2024
· updated Jul 2024
-
BorC
Lifestyle
Free
IAP?
Released Aug 2023
· updated Aug 2023
-
DivisorDescent
Education
Free
IAP?
Released Aug 2025
· updated Aug 2025
-
CommonDivisor
Education
Free
IAP?
Released Jun 2025
· updated Jul 2026
-
TranspositionOfItems
Education
Free
IAP?
Released Jun 2024
· updated Sep 2024
-
SumXMinus – Negative Math
Education
Free
IAP?
Released Apr 2024
· updated Jun 2026
-
GridCalculation
Education
Free
IAP?
Released May 2025
· updated Aug 2026
-
AdditionTraining
Education
Free
Released Feb 2024
· updated Oct 2024
-
Random Quiz
Education
Free
Released Apr 2025
· updated Feb 2026
-
Coordinates Master
Education
Free
Released Oct 2024
· updated May 2026
-
QuickAgePlus
Lifestyle
Free
SUB
Released Oct 2023
· updated May 2026
-
Neg Multiply – Brain Training
Education
Free
IAP?
Released Jul 2023
· updated Jun 2026
-
Make 10 - Mental Math
Education
Free
IAP?
Released Feb 2024
· updated Jun 2026
-
Multiply Pairs – Mental Math
Education
Free
IAP?
Released Jun 2023
· updated Jun 2026
-
MultiplicationTraining
Education
Free
IAP?
Released Feb 2024
· updated Oct 2024
-
Power of 2
Education
Free
IAP?
Released Jun 2023
· updated Jun 2023
-
QuickCheck3
Lifestyle
Free
Released May 2021
· updated Dec 2024
-
QuickAge
Lifestyle
Free
IAP?
Released Dec 2020
· updated Oct 2023
-
TimeCalculation
Lifestyle
Free
Released Aug 2023
· updated Dec 2024
-
Exponent
Education
Free
IAP?
Released Jul 2024
· updated Mar 2026