Time + Date Calculator vs onlyAlarm
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Time + Date Calculator
Calculate time differences, work days, and add or subtract time periods. Convert between units like seconds, minutes, and years. Determine future or past dates and calculate age.
- Calculate time differences
- Calculate work days
- Add/subtract time
- Multiply/divide time
- Time converter
- Date ranger
- Age calculator
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Time + Date Calculator is the perfect tool to work with time. It is by far the best and most accurate date and time calculator available for iOS! • TIME DIFFERENCE The Time Difference Calculator works out the difference between two periods of time. How long have you been at work today? - So type in: "17:30 - 7:45 =" and you get: 09:45 (9 hours and 45 minutes). • WORK DAYS Calculate work days between two calendar days. Exclude weekends and find out how many week days are left. • ADD/SUBTRACT TIME You can add or subtract time expressions defined in years, months, days, hours, minutes AND seconds • MULTIPLY/DIVIDE TIME You can multiply/divide time expressions defined in years, months, days, hours, minutes AND seconds • TIME CONVERTER Use this time converter to convert instantly between seconds, minutes, hours, days and years. • DATE RANGER What date is 10 days from now, or 5 weeks from now? With Date Ranger you can quickly determine the new date given a start date, and a date range in days, weeks, months, or years to add or subtract. • TIME ZONES Provides time zone conversions taking into account local time zone and accepts present, past or future dates. • AGE CALCULATOR Age Calculator simply shows your age (years old, months and days). • TIME TRAVEL Time Travel calculates the time left on your trip given total distance remaining and current average speed.
onlyAlarm
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Set alarms on any date, customize intervals, keep it simple—free forever.
Screenshots
Verdict
The clearest difference is price: onlyAlarm at Free against Time + Date Calculator's $0.99. Time + Date Calculator's advantage is device support (3 vs 1). On update cadence, ads, in-app purchases 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
onlyAlarm is free to download; Time + Date Calculator costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Time + Date Calculator ships an update every 3 months, onlyAlarm every 4 months. The most recent releases landed on September 22, 2026 and September 18, 2026 respectively.
| Parameter | Time + Date Calculator | onlyAlarm |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.7 (944 ratings) — better | — |
| Positive reviews | 91.4% of reviews | — |
| Number of ratings | 944 — better | — |
| Update frequency | Every 3 months — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.6 — better | 16.6 |
| Further details — not scored | ||
| Size | 1 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Thomas Tsopanakis | 景洙 李 |
Bugs and requests
Time + Date Calculator
Reported bugs
2 issues- Error in adding days calculation
- Inconsistent behavior when inputting times
Requested features
4 requests- Add support for calculating all days, not just work days
- Implement a calendar view to track time and dates
- Allow users to save and view their time logs
- Provide an option to display time in decimal format
onlyAlarm
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Time + Date Calculator
No in-app purchases
onlyAlarm
No in-app purchases
Questions
Is Time + Date Calculator free?
Is onlyAlarm free?
Do Time + Date Calculator or onlyAlarm have ads?
Which is updated more often, Time + Date Calculator or onlyAlarm?
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