Date and Time Calculator Pro vs Left
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Date and Time Calculator Pro
Calculate the precise time difference between any two dates and times, down to the second. Easily determine future or past dates based on a specified duration. Ideal for tracking events, financial periods, or personal milestones.
- Calculate time distance between dates
- Calculate days after a specific date
- Calculate date before a specific date
- Second-level precision
- Period time calculation
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Want to know how many days you can receive the Christmas gift? Want to know how many days you will have the college entrance exam?Want to know how many days the 158-day wealth management product expired? This tool helps you to calculate the distance between any time, down to second. It can also calculate the day after that day between any time. This tool is not only for wealth management but also for period time. It can tell you the date before or after a certain period.
Left
Visualize your entire life's timeline on a single grid, from past to future. Make choices each week to turn wasted time into legendary memories. No ads, social validation, or subscriptions, just your personal reflection.
- Single-screen life timeline
- Zoomable timeline view
- Weekly progress judgment (Iron/Gold)
- No ads or social distractions
- Focus on personal reflection
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You are not the average. Statistics say you have about 4,000 weeks. Society says you should drift through them, indistinguishable from the crowd. Your brain says "later." Left. is here to silence the noise. It is a solitary mirror for your existence. It lays out your entire timeline—from the fossilized layers of your past to the fading mist of your future—on a single, uncompromising grid. Time is dust. Your job is to turn it into gold. Every Monday, you face a judgment. Was the week wasted in the void? Or did you forge a memory so bright it burns like a star? • One Screen: Your whole life. No scrolling. No hiding. • One Gesture: Pinch to ascend to God’s eye view. Zoom to relive a single moment. • One Choice: Iron or Gold. Wasted or Legendary. No ads to distract you. No social networks to validate you. No subscriptions to rent your own life. Just you, the grid, and what remains. Make it count.
Screenshots
Verdict
The clearest difference is monetization model: Date and Time Calculator Pro at free against Left's paid. Date and Time Calculator Pro also leads on iOS requirement (15.0 vs 17.6). Left's advantage is review sentiment (100% vs 89%). On price, ads, in-app purchases and device support 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
Date and Time Calculator Pro costs $0.99 and Left $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Date and Time Calculator Pro | Left |
|---|---|---|
| Price | $0.99 | $0.99 |
| Rating | 4.8 (959 ratings) — better | — |
| Positive reviews | 88.9% of reviews | 100.0% of reviews — better |
| Number of ratings | 959 — better | — |
| Update frequency | Every 5 weeks | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 3 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | 山 钟 | 永鹏 裴 |
Customer experience
Date and Time Calculator Pro
Left
Bugs and requests
Date and Time Calculator Pro
Reported bugs
3 issues- Paid version has lost the ability to calculate future dates based on weeks
- Date selection uses a scroll wheel instead of keypad entry
- Unable to copy or share calculation results
Requested features
5 requests- Add ability to change year for date time calculation
- Implement dark mode
- Add iPad version
- Add divide option in time calculator
- Add ability to calculate working days
Left
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Date and Time Calculator Pro
No in-app purchases
Left
No in-app purchases
Questions
Is Date and Time Calculator Pro free?
Is Left free?
Do Date and Time Calculator Pro or Left have ads?
Other comparisons
