# OpenChart vs KnoTax试算

The clearest difference is in-app purchases: KnoTax试算 at none against OpenChart's 2. KnoTax试算 also leads on iOS requirement (13.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. OpenChart sells 2 in-app purchases, starting at $3.99 per month. KnoTax试算 asks for nothing beyond the download.

## The numbers

| Metric | OpenChart | KnoTax试算 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 8 days | — |
| Size | 67 MB | 18 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [younghyun choi](https://appshunter.io/developer/1844194272) | [hu chundong](https://appshunter.io/developer/583622748) |

## What reviewers say

### OpenChart

[App page](https://appshunter.io/ios/app/openchart-crypto-charts/id6778795322)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OpenChart PRO | $3.99 | per month |
| OpenChart Pro Yearly | $29.99 | per year |


### KnoTax试算

[App page](https://appshunter.io/ios/app/knotax/id6783840570)

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

**In-app purchases:** none


## Frequently asked questions

### Is OpenChart free?

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

### Is KnoTax试算 free?

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

### Do OpenChart or KnoTax试算 have ads?

Neither OpenChart nor KnoTax试算 shows ads.

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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.*