Comparison

Date.Time Calculator vs Impact!

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

Head to head
About

Date.Time Calculator

Calculate date and time differences, intervals, and perform unit conversions with a pure calculator interface. Useful for determining future or past dates, calculating total time for multiple events, and converting between various time units and POSIX time.

Highlights
  • Date and time point calculations
  • Time interval calculations
  • Unit conversion of time
  • POSIX time interconversion
  • Time zone mutual conversion
  • Arithmetic operations with time
Features
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Date.Time Calculator lets you easily perform calculations involving dates, times, and time intervals, as well as convert between units of time โ€” all with the familiar feel of a calculator. Date.Time Calculator supports the following operations: * Basic arithmetic with numbers (integers and decimals) * Arithmetic with numbers and Time Intervals * Operations between Time Intervals (addition, subtraction, and division) * Operations between Time Intervals and Time Points (addition and subtraction) * Operations between Time Points (calculating the difference) * Conversion between units of time * Conversion to and from POSIX Time * Conversion between time zones Date.Time Calculator is especially useful for questions such as: * What date is 100 days from today? * What date and time was it 32,768 seconds ago? * If one lap takes 1 minute 32.6 seconds, how long will 62 laps take? * What time will it be after those 62 laps? * How many days have passed since January 23 of this year? * How many days are 100,000 seconds? * What date and time does POSIX Time 1234567890 represent? * What is the current time in POSIX Time? And with a little creativity, Date.Time Calculator can be useful in many other situations as well.

About

Impact!

Features
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Master your long-range shooting with Impact!, the comprehensive ballistics tool designed for serious marksmen.ย  Whether you're at the range or preparing for competition, this powerful app delivers accurate calculations when it matters most. *Advanced Ballistic Solutions* Calculate precise firing solutions for any distance with our robust ballistic engine. Account for wind speed, direction, temperature, humidity, altitude, and more to ensure first-round hits at any range. *Range Management* Save detailed profiles for all your favorite shooting locations. Store target distances, elevations, and environmental conditions for quick access whenever you return to familiar territory. *Precision Rifle Series Ready* Seamlessly manage Precision Rifle Series matchbooks with our intuitive interface. Calculate and organize stage cards for each competition phase, giving you a competitive edge when every shot counts. *Comprehensive Toolkit* * Unit conversion utilities for distance, weight, and ballistic coefficients * Detailed reloading data storage for all your custom loads * DOPE cards with wind brackets accessible from your lock screen for quick reference in the field * Shot count tracking with barrel life monitoring *Built for Precision* Whether you're a PRS competitor, long-range enthusiast, or tactical professional, Impact! delivers the accuracy, reliability, and features you need for consistent performance behind the rifle. Download now and elevate your shooting to the next level.

Screenshots

Date.Time Calculator4 screens
Impact!4 screens

Verdict

The call

The clearest difference is price: Impact! at Free against Date.Time Calculator's $0.99. Impact! also leads on update cadence (fortnightly vs every 5 months). Date.Time Calculator's advantage is in-app purchases (none vs 1) and iOS requirement (15.6 vs 26.0). On ads and device support 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

Impact! is free to download; Date.Time Calculator costs $0.99 up front. Impact! sells 1 one-off in-app purchase. Date.Time Calculator asks for nothing beyond the download.

UpkeepUpdate frequency

Date.Time Calculator ships an update every 5 months, Impact! fortnightly. The most recent releases landed on October 13, 2026 and October 30, 2026 respectively.

Scorecard4 real differences ยท 4 level
Date.Time Calculator versus Impact!: the parameters behind the verdict, then further details
ParameterDate.Time CalculatorImpact!
Price$0.99Free โ€” better
Positive reviews0.0% of reviewsโ€”
Update frequencyEvery 5 monthsFortnightly โ€” better
AdsNoNo
In-app purchasesNo โ€” betterYes
MonetizationPaidโ€”
DevicesiPhone, iPodiPhone, iPad, Apple Watch โ€” better
Requires iOS15.6 โ€” better26.0
Further details โ€” not scored
Size1 MB13 MB
Age rating4+17+
DeveloperNoriaki HASHIBAAudun Kjelstrup

In-app purchases

None

Date.Time Calculator

No in-app purchases

1 purchases

Impact!

One-time1
  • Impact! Pro$14.99

Questions

Is Date.Time Calculator free?
Date.Time Calculator costs $0.99, with no in-app purchases.
Is Impact! free?
Impact! is free to download, with in-app purchases available.
Do Date.Time Calculator or Impact! have ads?
Neither Date.Time Calculator nor Impact! shows ads.
Which is updated more often, Date.Time Calculator or Impact!?
Date.Time Calculator ships an update every 5 months, and Impact! fortnightly. Most recently, Date.Time Calculator was updated on October 13, 2026 and Impact! on October 30, 2026.

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