# Time Calc. Pro vs BKmonitor

The clearest difference is price: BKmonitor at Free against Time Calc. Pro's $0.99. BKmonitor also leads on update cadence (fortnightly vs every 28 months). Time Calc. Pro's advantage is iOS requirement (13.4 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

BKmonitor is free to download; Time Calc. Pro costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Time Calc. Pro ships an update every 28 months, BKmonitor fortnightly. Both last shipped on October 25, 2026.

## The numbers

| Metric | Time Calc. Pro | BKmonitor |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 28 months | **Fortnightly** |
| Size | 2 MB | 8 MB |
| Requires iOS | **13.4** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hiroyuki Nishijima](https://appshunter.io/developer/1389796249) | [祖策 谢](https://appshunter.io/developer/983519195) |

## What reviewers say

### Time Calc. Pro

[App page](https://appshunter.io/ios/app/time-calc-pro/id1509605480)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### BKmonitor

[App page](https://appshunter.io/ios/app/bkmonitor/id6502943237)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Time Calc. Pro free?

Time Calc. Pro costs $0.99, with no in-app purchases.

### Is BKmonitor free?

BKmonitor is free to download, with no in-app purchases.

### Do Time Calc. Pro or BKmonitor have ads?

Neither Time Calc. Pro nor BKmonitor shows ads.

### Which is updated more often, Time Calc. Pro or BKmonitor?

Time Calc. Pro ships an update every 28 months, and BKmonitor fortnightly. Most recently, Time Calc. Pro was updated on October 25, 2026 and BKmonitor on October 25, 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.*