Comparison

Time Delay calculator vs RedoCalc

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

Head to head
About

Time Delay calculator

Features
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A calculator that can display calculation results with a delay to practice mental arithmetic. >Mental arithmetic practice mode Tap the timer key to turn on mental math practice mode. Enter the formula as usual. *Tap the timer key again to turn off the mental arithmetic practice mode. Return to normal calculator mode.

About

RedoCalc

Features
Read full description

This is a calculator for people who only use it for simple calculations, such as adding up receipts or calculating the cost of a meal split between several people, but who are always worried about whether the input was correct. As it is a simple calculator, the only operations it can perform are - Four arithmetic operations (addition, subtraction, multiplication, division) - Percentage calculations (including calculations such as consumption tax using percentages) . The results are displayed as numbers with a digit symbol. There is no complicated exponential display. The calculation proceeds in the order of the keys you enter. There is no priority for multiplication or division. The formulas you enter are displayed in order in the upper area as a history. If you tap the white part, it will turn yellow and you will be able to modify that part. (You can modify not only numbers, but also arithmetic symbols such as + and ร—.) If you tap โ€œ=โ€, the expressions from the first line to the last line will be recalculated. The result will be automatically copied, so you can switch to other apps and paste the value there.

Screenshots

Time Delay calculator2 screens
RedoCalc3 screens

Verdict

The call

The clearest difference is update cadence: RedoCalc at every 3 days against Time Delay calculator's fortnightly. Time Delay calculator's advantage is device support (3 vs 1) and iOS requirement (15.8.3 vs 18.0). On price, ads and in-app purchases 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Time Delay calculator ships an update fortnightly, RedoCalc every 3 days. The most recent releases landed on September 18, 2026 and September 8, 2026 respectively.

Scorecard3 real differences ยท 3 level
Time Delay calculator versus RedoCalc: the parameters behind the verdict, then further details
ParameterTime Delay calculatorRedoCalc
PriceFreeFree
Update frequencyFortnightlyEvery 3 days โ€” better
AdsYesYes
In-app purchasesNoNo
DevicesiPhone, iPad, iPod โ€” betteriPhone
Requires iOS15.8.3 โ€” better18.0
Further details โ€” not scored
Size36 MB3 MB
Age rating4+4+
DeveloperHideaki UchikoshiToshiyuki Kuwabara

In-app purchases

None

Time Delay calculator

No in-app purchases

None

RedoCalc

No in-app purchases

Questions

Is Time Delay calculator free?
Time Delay calculator is free to download, with no in-app purchases.
Is RedoCalc free?
RedoCalc is free to download, with no in-app purchases.
Do Time Delay calculator or RedoCalc have ads?
Both Time Delay calculator and RedoCalc show ads.
Which is updated more often, Time Delay calculator or RedoCalc?
Time Delay calculator ships an update fortnightly, and RedoCalc every 3 days. Most recently, Time Delay calculator was updated on September 18, 2026 and RedoCalc on September 8, 2026.

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