Comparison

Time Jump vs Tempus Calc

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

Tempus Calc

Features
Read full description

FEATURES DURATION CALCULATOR • Calculate the exact time between any two dates • See results in years, months, and total days • Perfect for age calculations, anniversary tracking, and project timelines • Instant results as you select dates ADD/SUBTRACT DAYS • Find future dates by adding days • Calculate past dates by subtracting days • Support for negative values up to 100 years • Ideal for deadline planning and scheduling SAVED CALCULATIONS • Save frequently used calculations for quick access • Search and filter your saved items • Swipe to delete individual calculations • Clear all with confirmation protection • Perfect for recurring date calculations BEAUTIFUL DESIGN • Elegant, modern interface • Full Dark Mode support • Smooth animations and haptic feedback • Color-coded results for clarity • Optimized for all iPhone sizes PERFECT FOR • Project Managers - Track milestones and deadlines • Event Planners - Calculate dates for weddings, parties, conferences • Business Professionals - Plan delivery dates and schedules • Students - Track assignment due dates and semester planning • Travelers - Plan trips and calculate vacation lengths • Parents - Track child development milestones • Anyone who works with dates regularly WHY CHOOSE TEMPUS CALC? PRIVACY FIRST All calculations are stored locally on your device. No data collection, no tracking, no cloud sync required. Your dates are yours alone. LIGHTNING FAST Calculations happen instantly as you interact. No waiting, no loading screens. Just immediate results. OFFLINE CAPABLE Works perfectly without internet connection. Calculate dates anywhere, anytime. NO ADS Focus on your calculations without distractions. No advertisements, ever. HOW IT WORKS Duration Mode: 1. Select a start date 2. Select an end date 3. See instant results in multiple formats 4. Save for later if needed Add Days Mode: 1. Choose a starting date 2. Enter number of days (positive or negative) 3. See the resulting date immediately 4. Save your calculation for future reference

Screenshots

Time Jump4 screens
Tempus Calc4 screens

Verdict

The call

The clearest difference is price: Tempus Calc at Free against Time Jump's $7.99. Tempus Calc also leads on update cadence (every 8 days vs every 2 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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

Time Jump ships an update every 2 months, Tempus Calc every 8 days. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.

Scorecard2 real differences · 8 level
Time Jump versus Tempus Calc: the parameters behind the verdict, then further details
ParameterTime JumpTempus Calc
Price$7.99Free — better
Rating5.0 (5 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings5 — better—
Update frequencyEvery 2 monthsEvery 8 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad — betteriPhone
Requires iOS17.6 — better18.0
Further details — not scored
Size3 MB3 MB
Age rating4+4+
DeveloperTime Theory Softwareommar alquisi

In-app purchases

None

Time Jump

No in-app purchases

None

Tempus Calc

No in-app purchases

Questions

Is Time Jump free?
Time Jump costs $7.99, with no in-app purchases.
Is Tempus Calc free?
Tempus Calc is free to download, with no in-app purchases.
Do Time Jump or Tempus Calc have ads?
Neither Time Jump nor Tempus Calc shows ads.
Which is updated more often, Time Jump or Tempus Calc?
Time Jump ships an update every 2 months, and Tempus Calc every 8 days. Most recently, Time Jump was updated on October 24, 2026 and Tempus Calc on October 30, 2026.

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