Comparison

TimeCalc vs On Time

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

Head to head
About

TimeCalc

This app accurately calculates time-related tasks, including working hours, durations between dates, and age. It offers a user-friendly interface with dark mode and offline functionality, allowing for easy time management for work and personal life.

Highlights
  • Calculate working hours
  • Calculate time between two points
  • Add and subtract time
  • Calculate age
  • Convert time units
  • Export calculations to PDF
Features
Read full description

TimeCalc is a powerful yet simple time calculator for everyday use — add and subtract hours, track work durations, calculate future dates, and find exact age in seconds. TIME CALCULATOR Add, subtract multiple time values in sequence. Instant results, calculation history saved. Examples: 2h 35m + 3h 45m = 6h 20m 12h 20m − 4.5h = 7h 50m 4h 52m × 3 = 14h 36m 1h ÷ 20m = 3 Convert between time units: 456m = 7h 36m = 7.6h TIME BETWEEN (DURATION) Enter any start and end time to calculate the exact duration. Organize into separate categories. Export PDF reports (Premium). Examples: 11:20 AM → 12:40 PM = 1h 20m 01:30 AM → 02:30 PM = 13h Today 02:00 → Tomorrow 02:30 = 24h 30m DATE CALCULATOR (ADD & SUBTRACT) From any starting date, add or subtract years/months/weeks/days/hours/minutes to get the resulting date. Calendar-accurate arithmetic — adding 1 month to Jan 31 gives the correct last day of February. Example: Today 17:32 + (1d 2h) = Tomorrow 19:32 AGE CALCULATOR Calculate exact age in years, months, and days from a birth date. Save multiple birthdays to track. --- KEY FEATURES • Automatic light & dark mode • Supports both 12h and 24h formats • Multi-language support • No account, no cloud — 100% local data • Privacy-first — your data never leaves your device --- PREMIUM Upgrade to Premium to unlock the full experience: • Remove all ads • Unlimited Time Between categories • Export reports to PDF • Advanced time unit customization Subscription plans: Monthly, Quarterly, Yearly, or Lifetime. --- Perfect for tracking work hours, calculating durations, and managing time efficiently. Thank you for using TimeCalc! [Terms] https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

On Time

Features
Read full description

Know exactly when to get started — so you show up on time, every time. You know when you need to be there. The hard part is everything that has to happen first: getting the kids in the car, grabbing coffee, stopping for gas, picking up a gift. On Time counts back from your deadline through each of those steps and tells you the exact minute to start. HOW IT WORKS 1. Set your "Be There" or End time. 2. Add each thing you need to do first, with how many minutes it takes. 3. On Time adds it up and shows the time you need to get started. That's it. Change a step and your start time updates instantly. GREAT FOR • Getting to practice, school or work after a few errands • Getting ready for a dinner, party or date night • Appointments where you need to park, check in or fill out forms • Morning routines: shower, breakfast, drop-off, commute • Catching a flight, train or ride with time to spare • Anyone who always thinks "I have plenty of time" FEATURES • Count back from any end time • Unlimited steps, each with its own minutes • Drag to reorder steps; delete what you don't need • Running total of all your prep and travel time • Your list is saved automatically for next time • No account, no sign-up • Works offline Stop guessing. Start on time. Questions or ideas? Use Contact in the app menu — we read every message.

Screenshots

TimeCalc4 screens
On Time2 screens

Verdict

The call

The clearest difference is in-app purchases: On Time at none against TimeCalc's 4. TimeCalc's advantage is update cadence (every 5 weeks vs every 3 months). On price, ads, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. TimeCalc sells 4 in-app purchases, starting at $0.99 per month. On Time asks for nothing beyond the download.

UpkeepUpdate frequency

TimeCalc ships an update every 5 weeks, On Time every 3 months. The most recent releases landed on November 2, 2026 and October 30, 2026 respectively.

Scorecard2 real differences · 8 level
TimeCalc versus On Time: the parameters behind the verdict, then further details
ParameterTimeCalcOn Time
PriceFreeFree
Rating4.5 (91 ratings) — better—
Positive reviews78.8% of reviews—
Number of ratings91 — better—
Update frequencyEvery 5 weeks — betterEvery 3 months
AdsYesYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.115.0 — better
Further details — not scored
Size37 MB18 MB
Age rating4+4+
DeveloperHa ThanhJMS TECHNOLOGY SYSTEMS

In-app purchases

4 purchases

TimeCalc

Subscriptions3
  • Premium subscription 1 month3 Days trial$0.991 Month
  • Premium subscription 3 month3 Days trial$1.993 Months
  • Premium subscription 1 year3 Days trial$4.991 Year
One-time1
  • Premium$14.99
None

On Time

No in-app purchases

Questions

Is TimeCalc free?
TimeCalc is free to download, with in-app purchases available.
Is On Time free?
On Time is free to download, with no in-app purchases.
Do TimeCalc or On Time have ads?
Both TimeCalc and On Time show ads.
Which is updated more often, TimeCalc or On Time?
TimeCalc ships an update every 5 weeks, and On Time every 3 months. Most recently, TimeCalc was updated on November 2, 2026 and On Time on October 30, 2026.

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