# ScrewFinderAI vs Write on PDF

The clearest difference is in-app purchases: ScrewFinderAI at none against Write on PDF's 3. ScrewFinderAI also leads on iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Write on PDF sells 3 in-app purchases, starting at $4.99 per 7 days. ScrewFinderAI asks for nothing beyond the download.

## The numbers

| Metric | ScrewFinderAI | Write on PDF |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (1 ratings)](https://appshunter.io/ios/app/screwfinderai/id6759080731/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 days | — |
| Monetization | Free | — |
| Size | 6 MB | 22 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Brandon Horton](https://appshunter.io/developer/1844079517) | [Fenuku Kekeli](https://appshunter.io/developer/1822419894) |

## What reviewers say

### ScrewFinderAI

[App page](https://appshunter.io/ios/app/screwfinderai/id6759080731)

Instantly identify screws, bolts, nuts, and washers using AI-powered image recognition. Get exact sizing, thread type, material, and compatible part numbers in seconds. Find where to buy replacements with detailed specifications.

**Highlights:** AI fastener scanning, Full specification breakdown, "Where to Buy" guidance, Scan history log, Instant identification, Detailed output

**Features:** macOS Compatibility

**In-app purchases:** none


### Write on PDF

[App page](https://appshunter.io/ios/app/write-on-pdf-edit-and-annotate/id6801932711)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All Access for a week | $4.99 | per 7 days |
| All Access for a year | $39.99 | per year |
| All Access | $99.99 | one-time |


## Frequently asked questions

### Is ScrewFinderAI free?

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

### Is Write on PDF free?

Write on PDF is free to download, with in-app purchases available.

### Do ScrewFinderAI or Write on PDF have ads?

Neither ScrewFinderAI nor Write on PDF 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.*