# ScanOnce vs Thought Relay

The clearest difference is update cadence: ScanOnce at every 5 days against Thought Relay's monthly. Thought Relay's advantage is device support (5 vs 2). On price, ads, in-app purchases and iOS requirement there is nothing between them.

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

ScanOnce ships an update every 5 days, Thought Relay monthly. The most recent releases landed on September 9, 2026 and September 5, 2026 respectively.

## The numbers

| Metric | ScanOnce | Thought Relay |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/scanonce-pdf-doc-scanner/id6780030918/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Monthly |
| Monetization | Free with in-app purchases | — |
| Size | 4 MB | 3 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac, Apple Watch, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [Andrii Zakharov](https://appshunter.io/developer/6779217338) | [Myworkingmemory LLC](https://appshunter.io/developer/1892099684) |

## What reviewers say

### ScanOnce

[App page](https://appshunter.io/ios/app/scanonce-pdf-doc-scanner/id6780030918)

This app scans documents directly on your device without using the cloud or requiring an account. It offers automatic edge detection, page straightening, and text recognition for easy searching. Export scans as PDFs or JPEGs, and secure your documents with Face ID.

**Highlights:** Automatic edge detection and page straightening, On-device text recognition for search, Export as PDF or JPEG, Multi-page document capture, Document organization with folders, Face ID security

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

**In-app purchases:** none


### Thought Relay

[App page](https://appshunter.io/ios/app/thought-relay-fast-notes/id6789680363)

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is ScanOnce free?

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

### Is Thought Relay free?

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

### Do ScanOnce or Thought Relay have ads?

Neither ScanOnce nor Thought Relay shows ads.

### Which is updated more often, ScanOnce or Thought Relay?

ScanOnce ships an update every 5 days, and Thought Relay monthly. Most recently, ScanOnce was updated on September 9, 2026 and Thought Relay on September 5, 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.*