# STF vs Contractor Estimate to Invoice

The clearest difference is in-app purchases: STF at none against Contractor Estimate to Invoice's 2. STF also leads on iOS requirement (13.0 vs 17.6). On price, ads and device support there is nothing between them.

Both are free to download. Contractor Estimate to Invoice sells 2 in-app purchases, starting at $4.99 per 7 days. STF asks for nothing beyond the download.

## The numbers

| Metric | STF | Contractor Estimate to Invoice |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 6 weeks |
| Size | 19 MB | 15 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Hany Salh](https://appshunter.io/developer/1853518575) | [Redouan Afoulous](https://appshunter.io/developer/1896591505) |

## What reviewers say

### STF

[App page](https://appshunter.io/ios/app/stf-asas/id6758222908)

**Features:** macOS Compatibility

**In-app purchases:** none


### Contractor Estimate to Invoice

[App page](https://appshunter.io/ios/app/contractor-estimate-to-invoice/id6790192708)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Pro Plan | $4.99 | per 7 days |
| Yearly Pro Plan | $29.99 | per year |


## Frequently asked questions

### Is STF free?

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

### Is Contractor Estimate to Invoice free?

Contractor Estimate to Invoice is free to download, with in-app purchases available.

### Do STF or Contractor Estimate to Invoice have ads?

Neither STF nor Contractor Estimate to Invoice 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.*