# Time Calculator vs Sleep Time Calculator

The clearest difference is rating: Time Calculator at 4.7 against Sleep Time Calculator's 3.8. Time Calculator also leads on update cadence (every 2 weeks vs every 3 months) and ratings volume (3K vs 23). Sleep Time Calculator's advantage is in-app purchases (none vs 6) and iOS requirement (8.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. Time Calculator sells 6 in-app purchases, starting at $2.99 per month. Sleep Time Calculator asks for nothing beyond the download.

Time Calculator holds the better App Store score, 4.7 against 3.8. That said, the two scores are not equally well evidenced: Time Calculator has 3K ratings behind it against 23, so its average is the more settled of the two. Written reviews point the same way: 79% of Time Calculator's written reviews are positive against 70% of Sleep Time Calculator's.

Time Calculator ships an update every 2 weeks, Sleep Time Calculator every 3 months. The most recent releases landed on November 12, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | Time Calculator | Sleep Time Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (3K ratings)](https://appshunter.io/ios/app/time-calculator-work-hours/id565039079/reviews)** | [3.8 (23 ratings)](https://appshunter.io/ios/app/sleep-time-calculator/id606077861/reviews) |
| Number of ratings | **3K** | 23 |
| Positive reviews | **79.1% of reviews** | 69.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 months |
| Monetization | Freemium | **Free** |
| Size | 15 MB | 55 MB |
| Requires iOS | 15.0 | **8.0** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Oval Software Oy](https://appshunter.io/developer/1438258178) | [Recked Software LLC](https://appshunter.io/developer/606077864) |

## What reviewers say

### Time Calculator

[App page](https://appshunter.io/ios/app/time-calculator-work-hours/id565039079)

This app offers a comprehensive suite of tools for managing time, dates, and schedules. It includes calculators for tracking work hours, planning shifts, converting time formats, and calculating differences between dates. It's designed for professionals, freelancers, and everyday users needing precise time management.

**Highlights:** Work hour tracking, Shift scheduling, Date difference calculation, Countdown timers, Time zone comparison, Age calculation, Time conversion

**Features:** Vision Pro support, iPhone Duo support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Time Calculator Pro Monthly | $2.99 | per month |
| Time Calculator Premium Monthl | $3.99 | per month |
| Time Calculator Premium | $14.99 | per year |
| Time Calculator Premium | $19.99 | per year |
| Time Calculator Premium | $19.99 | one-time |
| Unlock all features | $29.99 | one-time |

**What reviewers like**

- 🚀 Great Time calculator App
- 👍 Handy and easy to use
- 👍 Excellent
- 👍 Awesome
- 👍 Useful

**What reviewers complain about**

- 🐛 Editing
- 🐛 Not designed for use on more than one device?
- 💰 Too Expensive
- 💰 需要收费
- 💰 Not worth the money

**Reported bugs**

- Unable to upgrade
- Calculator does not show hours, minutes and seconds. Only hour and minutes
- Seconds don't work on a TIME calculator!
- The last update is bad, it doesn't work!
- The settings doesn't work after the last update

**Requested features**

- Overtime calculator
- Decimals for time calculator
- Ability to delete entries
- Ability to edit or pick the days on the calendar
- Ability to have the work time calculator on Mac


### Sleep Time Calculator

[App page](https://appshunter.io/ios/app/sleep-time-calculator/id606077861)

This free utility helps you determine optimal wake-up times based on sleep cycles. It aims to reduce grogginess by recommending times to rise at the end of a sleep cycle, promoting a more alert feeling.

**Highlights:** Optimal wake-up time recommendations, Sleep cycle analysis, Reduces grogginess, Promotes alertness, Free to use

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Time Calculator free?

Time Calculator is free to download, with in-app purchases available.

### Is Sleep Time Calculator free?

Sleep Time Calculator is free to download, with no in-app purchases.

### Which has better reviews, Time Calculator or Sleep Time Calculator?

Time Calculator is rated higher. Time Calculator averages 4.7 out of 5 from 3K ratings, while Sleep Time Calculator averages 3.8 from 23 ratings.

### Do Time Calculator or Sleep Time Calculator have ads?

Neither Time Calculator nor Sleep Time Calculator shows ads.

### Which is updated more often, Time Calculator or Sleep Time Calculator?

Time Calculator ships an update every 2 weeks, and Sleep Time Calculator every 3 months. Most recently, Time Calculator was updated on November 12, 2026 and Sleep Time Calculator on November 1, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*