# Scan Documents to PDF l by TSP vs RingGauge

The clearest difference is update cadence: RingGauge at every 3 days against Scan Documents to PDF l by TSP's monthly. Scan Documents to PDF l by TSP's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 16.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Scan Documents to PDF l by TSP sells 3 in-app purchases, starting at $3.99 per month and RingGauge sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Scan Documents to PDF l by TSP ships an update monthly, RingGauge every 3 days. The most recent releases landed on October 19, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Scan Documents to PDF l by TSP | RingGauge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (258 ratings)](https://appshunter.io/ios/app/scan-documents-to-pdf-l-by-tsp/id1602579538/reviews)** | — |
| Number of ratings | **258** | — |
| Positive reviews | 37.5% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 30 MB | 1 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [The Salty Pistachio](https://appshunter.io/developer/1507018512) | [Jhomar Maravillas](https://appshunter.io/developer/6783703541) |

## What reviewers say

### Scan Documents to PDF l by TSP

[App page](https://appshunter.io/ios/app/scan-documents-to-pdf-l-by-tsp/id1602579538)

Transform your phone into a portable scanner. Easily capture documents, receipts, and notes, then save them as PDFs, images, or text. Organize, protect, and share your scanned files with cloud syncing and annotation tools.

**Highlights:** Auto scan with edge detection, Save as PDF, Image, or TXT, Cloud sync (iCloud, other storage), Password protection, Edit, annotate, and add filters, Add watermarks, Digital signature, Text extraction (OCR)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $3.99 | per month |
| Quarterly Subscription | $9.99 | per 3 months |
| Annual Subscription | $19.99 | per year |


### RingGauge

[App page](https://appshunter.io/ios/app/ringgauge-ring-sizer/id6792487713)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Unlimited | $4.99 | one-time |


## Frequently asked questions

### Is Scan Documents to PDF l by TSP free?

Scan Documents to PDF l by TSP is free to download, with in-app purchases available.

### Is RingGauge free?

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

### Do Scan Documents to PDF l by TSP or RingGauge have ads?

Neither Scan Documents to PDF l by TSP nor RingGauge shows ads.

### Which is updated more often, Scan Documents to PDF l by TSP or RingGauge?

Scan Documents to PDF l by TSP ships an update monthly, and RingGauge every 3 days. Most recently, Scan Documents to PDF l by TSP was updated on October 19, 2026 and RingGauge on October 11, 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.*