# OneApp by Pertinence vs EInvoicely by CryptwareSystems

The clearest difference is update cadence: EInvoicely by CryptwareSystems at weekly against OneApp by Pertinence's every 3 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

OneApp by Pertinence ships an update every 3 weeks, EInvoicely by CryptwareSystems weekly. The most recent releases landed on September 17, 2026 and September 1, 2026 respectively.

## The numbers

| Metric | OneApp by Pertinence | EInvoicely by CryptwareSystems |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Size | 51 MB | 26 MB |
| Requires iOS | **15.1** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pettysave Limited](https://appshunter.io/developer/1496560186) | [Cryptware Systems](https://appshunter.io/developer/1878662031) |

## What reviewers say

### OneApp by Pertinence

[App page](https://appshunter.io/ios/app/oneapp-by-pertinence/id6749248679)

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

**In-app purchases:** none


### EInvoicely by CryptwareSystems

[App page](https://appshunter.io/ios/app/einvoicely-by-cryptwaresystems/id6759449941)

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

**In-app purchases:** none


## Frequently asked questions

### Is OneApp by Pertinence free?

OneApp by Pertinence is free to download, with no in-app purchases.

### Is EInvoicely by CryptwareSystems free?

EInvoicely by CryptwareSystems is free to download, with no in-app purchases.

### Do OneApp by Pertinence or EInvoicely by CryptwareSystems have ads?

Neither OneApp by Pertinence nor EInvoicely by CryptwareSystems shows ads.

### Which is updated more often, OneApp by Pertinence or EInvoicely by CryptwareSystems?

OneApp by Pertinence ships an update every 3 weeks, and EInvoicely by CryptwareSystems weekly. Most recently, OneApp by Pertinence was updated on September 17, 2026 and EInvoicely by CryptwareSystems on September 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.*