Date.Time Calculator vs Alertr Australia
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Date and time point calculations
- Time interval calculations
- Unit conversion of time
- POSIX time interconversion
- Time zone mutual conversion
- Arithmetic operations with time
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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 — 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.
Alertr Australia
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Free fire tracker in NSW Australia, more states coming soon!
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Verdict
The clearest difference is price: Alertr Australia at Free against Date.Time Calculator's $0.99. Alertr Australia also leads on update cadence (every 2 days vs every 5 months). On ads, in-app purchases, 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
Alertr Australia is free to download; Date.Time Calculator costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Date.Time Calculator ships an update every 5 months, Alertr Australia every 2 days. The most recent releases landed on November 1, 2026 and November 8, 2026 respectively.
| Parameter | Date.Time Calculator | Alertr Australia |
|---|---|---|
| Price | $0.99 | Free — better |
| Positive reviews | 0.0% of reviews | — |
| Update frequency | Every 5 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 1 MB | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | Noriaki HASHIBA | Vinitha Amaram |
In-app purchases
Date.Time Calculator
No in-app purchases
Alertr Australia
No in-app purchases
Questions
Is Date.Time Calculator free?
Is Alertr Australia free?
Do Date.Time Calculator or Alertr Australia have ads?
Which is updated more often, Date.Time Calculator or Alertr Australia?
Other comparisons
