Comparison

Time Jump vs Whenr Whenr

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

Head to head
About

Time Jump

Easily calculate the difference between dates, including business days, with side-by-side calendars. Add or subtract time periods and integrate with your device's calendar for event viewing and management.

Highlights
  • Calculate days between dates
  • Business day calculations
  • Side-by-side calendar view
  • Add/subtract time periods
  • Integrates with device calendar
  • Customizable holidays and days off
Features
Read full description

Date Calculator Time Jump for iPhone & iPad is a full-featured date calculator (counts the days between two dates) that uses side-by-side calendars to allow you to flip backward and forward in time. Tap on dates and instantly see the time difference between them in days and business days as well as the total time in years, months, weeks and days. Based on a recent customer request, results are also displayed in weeks & days. Don't want to flip through calendars? Double-tap on the selected date above either calendar and use the date picker to select a specific date – your birthday, a project deadline, an anniversary – anything. Time Jump supports dates up to 2,000 years in the past or the future. You can always tap days directly on the calendar to fine tune your selection. Time Jump's DateCalc When you need to do a specific calculation - like 180 days from a date, 45 business days before a date, 40 weeks from a date, etc. - use the DateCalc feature that allows you to add/subtract days, business days, weeks, months or years to/from any date. Business Day Calculations In addition to calendar days, Time Jump quickly and easily calculates the number of business days between two dates – this can be essential for project managers, shippers, attorneys, software developers, manufacturers – anyone working in business days. Time Jump can take US Federal and State holidays into account (skipping them) when calculating business days and you can select exactly which holidays to skip. You can also add your own custom days off (Personal Days) that are skipped for business day calculations. You can even set which days of the week are considered business days if you need to use something other than Monday through Friday. Integrated with Your iPhone/iPad Calendar Time Jump - with your permission - can be fully integrated with your iPhone/iPad calendar. You can see events - and even create or delete them - from within Time Jump. A tap on the selected date above either calendar and you will see a list of the calendar events you have chosen to view from within Time Jump in the Date Detail View. Use the Time Jump settings to select one, some or all of your calendars - including your Google calendar. Create Custom Days Off for Business Day Calculations As mentioned above, in addition to standard business day calculations, you can also add your own custom days off - Personal Days - (vacations, travel, school schedules, etc.) and Time Jump will treat these days as non-business days in the business day calculations. Of course, you can use settings to turn this feature on and off. Time Jump allows you to create your days off directly from within the app - and then they will appear in your selected iPhone calendar. Time Jump Date Detail View The Date Detail View shows you more details about a selected date: holiday information and/or a list of activities from your iPhone/iPad calendar (if you've given Time Jump permission to take a look). Once you've done a calculation you may wonder what's on your calendar and you can see your schedule from within Time Jump. Who's Time Jump for? Project managers Planners & schedulers Attorneys & paralegals Scientists Procurement managers Logistics specialists Shippers Investors & bankers Historians Educators Time explorers Anyone interested in time Follow us in Twitter: http://www.twitter.com/timetheoryapps Time Jump does not use a network connection during normal operation - use it anywhere, anytime. It does use a network connection if you access our website from within the app or provide app feedback directly to us.

About

Whenr Whenr

This app simplifies complex time calculations, helping you easily determine time differences, future times, and duration sums. It offers an intuitive interface and convenient options to copy, set reminders, or share results.

Highlights
  • Calculate time differences
  • Determine future times
  • Sum time durations
  • Copy results to clipboard
  • Create reminders from results
  • Share time calculations
Features
Read full description

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.

Screenshots

Time Jump4 screens
Whenr Whenr4 screens

Verdict

The call

The clearest difference is price: Whenr Whenr at Free against Time Jump's $7.99. Time Jump's advantage is review sentiment (100% vs 67%) and update cadence (every 2 months vs every 22 months). On rating, ratings volume, ads and in-app purchases 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

Whenr Whenr is free to download; Time Jump costs $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Time Jump against 5.0 for Whenr Whenr. Both are backed by a comparable volume of ratings — 5 and 4 respectively. Written reviews are what separate them: 100% of Time Jump's written reviews are positive against 67% of Whenr Whenr's.

UpkeepUpdate frequency

Time Jump ships an update every 2 months, Whenr Whenr every 22 months. Both last shipped on October 2, 2026.

Scorecard4 real differences · 6 level
Time Jump versus Whenr Whenr: the parameters behind the verdict, then further details
ParameterTime JumpWhenr Whenr
Price$7.99Free — better
Rating5.0 (5 ratings)5.0 (4 ratings)
Positive reviews100.0% of reviews — better66.7% of reviews
Number of ratings5 — better4
Update frequencyEvery 2 months — betterEvery 22 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPadiPhone, iPad, Mac — better
Requires iOS17.616.1 — better
Further details — not scored
Size3 MB4 MB
Age rating4+4+
DeveloperTime Theory SoftwareDarin Kelkhoff

Customer experience

Time Jump

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews10 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Whenr Whenr

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

In-app purchases

None

Time Jump

No in-app purchases

None

Whenr Whenr

No in-app purchases

Questions

Is Time Jump free?
Time Jump costs $7.99, with no in-app purchases.
Is Whenr Whenr free?
Whenr Whenr is free to download, with no in-app purchases.
Which has better reviews, Time Jump or Whenr Whenr?
Time Jump and Whenr Whenr are both rated 5.0 out of 5 on the App Store, from 5 and 4 ratings respectively.
Do Time Jump or Whenr Whenr have ads?
Neither Time Jump nor Whenr Whenr shows ads.
Which is updated more often, Time Jump or Whenr Whenr?
Time Jump ships an update every 2 months, and Whenr Whenr every 22 months. Most recently, Time Jump was updated on October 2, 2026 and Whenr Whenr on October 2, 2026.

Other comparisons