# ChronoCalc Pro vs DocPort

The clearest difference is price: ChronoCalc Pro at Free against DocPort's $4.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

ChronoCalc Pro is free to download; DocPort costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ChronoCalc Pro ships an update every 8 days, DocPort every 2 weeks. The most recent releases landed on October 2, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | ChronoCalc Pro | DocPort |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 2 weeks |
| Size | 4 MB | 1 MB |
| Requires iOS | **16.6** | 17 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [ERLEND JOHNSRUD VAAGE](https://appshunter.io/developer/1760100550) | [贺 周](https://appshunter.io/developer/1815397078) |

## What reviewers say

### ChronoCalc Pro

[App page](https://appshunter.io/ios/app/chronocalc-pro/id6757017750)

**Features:** macOS Compatibility

**In-app purchases:** none


### DocPort

[App page](https://appshunter.io/ios/app/docport/id6764198170)

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

**In-app purchases:** none


## Frequently asked questions

### Is ChronoCalc Pro free?

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

### Is DocPort free?

DocPort costs $4.99, with no in-app purchases.

### Do ChronoCalc Pro or DocPort have ads?

Neither ChronoCalc Pro nor DocPort shows ads.

### Which is updated more often, ChronoCalc Pro or DocPort?

ChronoCalc Pro ships an update every 8 days, and DocPort every 2 weeks. Most recently, ChronoCalc Pro was updated on October 2, 2026 and DocPort on September 24, 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.*