# Otrack Invoice vs Solid Order Entry™

The clearest difference is iOS requirement: Solid Order Entry™ at 12.2 against Otrack Invoice's 15.6. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Otrack Invoice ships an update every 3 months, Solid Order Entry™ every 4 months. The most recent releases landed on October 9, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Otrack Invoice | Solid Order Entry™ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 4 months |
| Size | 118 MB | 129 MB |
| Requires iOS | 15.6 | **12.2** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Otrack Inc](https://appshunter.io/developer/1495591605) | [Solid Innovation Systems Inc.](https://appshunter.io/developer/1209552105) |

## What reviewers say

### Otrack Invoice

[App page](https://appshunter.io/ios/app/otrack-invoice/id1502871573)

**Features:** Apple Wallet

**In-app purchases:** none


### Solid Order Entry™

[App page](https://appshunter.io/ios/app/solid-order-entry/id1575979606)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Otrack Invoice free?

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

### Is Solid Order Entry™ free?

Solid Order Entry™ is free to download, with no in-app purchases.

### Do Otrack Invoice or Solid Order Entry™ have ads?

Neither Otrack Invoice nor Solid Order Entry™ shows ads.

### Which is updated more often, Otrack Invoice or Solid Order Entry™?

Otrack Invoice ships an update every 3 months, and Solid Order Entry™ every 4 months. Most recently, Otrack Invoice was updated on October 9, 2026 and Solid Order Entry™ on September 23, 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.*