Whenr Whenr vs ChronoSum

Doing math with dates and times is hard. Whenr Whenr makes it easy, with a simple calculator-style interface for dates, times, durations, and unit conversions. There are no awkward forms, no modes to switch between, and no workflows to learn. Just type in your values, select the function you want to apply, and get your answer. With Whenr Whenr you can: - Answer time questions quick and easy. For example, calculate “how long is it from now until 7:42?” or “what time will it be in 4 hours and 47 minutes?”? - Count days between dates, add weeks to a date, or work across months without manually counting. - Make schedules easier to reason about. Figure out equal turns, manipulate durations, split time fairly, and keep plans running smoothly. - Make weird durations readable. Convert amounts like 400 hours into weeks, 5,000 minutes into days, or 10,000 seconds into hours, so you can actually think about them. And it does all this in a familiar calculator-style interface - not a maze of tabs and dropdowns. There's no mode switching, no confusing forms, and no translating your question into an app's weird logic. You just enter dates and times using the keypad and get the right answer fast.

ChronoSum is a clean, fast calculator for adding and subtracting hours and minutes. Think of it as a duration tape — you key in a time, press + or −, and the running total updates instantly. USE IT FOR • Flight time • Work hours and timesheets • Study sessions and exam prep • Workout duration • Project time tracking • Shift calculations • Travel duration • Freelance billing prep FEATURES • Calculator-style keypad with real arithmetic semantics • Live calculation tape — every entry is visible and editable • Tap a row to edit, swipe to delete, swipe to flip + / − • Save calculations to local history; tap any history entry to reopen it • Share the result as a clean plain-text arithmetic block • Display the total as hours and minutes, compact (3h09), or decimal hours • Type a bare number as minutes or hours — your choice PRIVACY All your calculations stay on your iPhone. ChronoSum has no account, no login, no backend, and no analytics. The only network traffic is the in-app banner ad served by Google AdMob.