# DunFlow — Offline QR File Transfer

> Offline QR-based optical flow technology for secure, cross-platform data transfer. (iPhone/iPad app by 敏 单.)

- Source: https://appshunter.io/ios/app/dunflow/id6796679850 (this page in markdown: same URL + `.md`)
- Developer: [敏 单](https://appshunter.io/developer/1856430877)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 18.0 · 84 MB
- Languages: American English, French (France), German (Germany), Japanese, Korean, European Portuguese, Chinese (Simplified, China), European Spanish, Chinese (Traditional, Taiwan)
- Released: 2026-09-16
- Data updated: 2026-09-21
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/dunflow/id6796679850/reviews.md

## What is DunFlow?

DunFlow is a highly innovative cross-platform data transfer tool. Unlike traditional Bluetooth or Wi-Fi pairing, DunFlow utilizes unique high-speed optical flow technology. Simply display a dynamic visual data stream on one device and capture it with the camera on another to complete the transfer.

Core Features:

Physically Isolated Transfer: No Wi-Fi or cellular network required, and no Bluetooth pairing needed. Achieve true physically isolated, offline data transfer.

Military-Grade Encryption: Built-in AES and SM4 strong encryption algorithms ensure your data is protected at the highest level, completely eliminating network eavesdropping and privacy leaks.

Minimalist Cross-Platform Experience: Break down the barriers between different operating systems. Generate the data stream on one end and scan to receive on the other.

Applicable Scenarios:
Ideal for network-free environments, highly confidential meeting rooms, or situations where you need to quickly transfer sensitive text, keys, ID photos, and lightweight documents across systems.

Important Usage Note:
Because optical flow technology is limited by physical screen refresh rates and camera capture frame rates, this app is specifically designed for transferring text, links, and small files. DunFlow is NOT suitable for transferring large HD videos or massive files. It is your most reliable tool for the secure flow of lightweight data.

Upgrade to DunFlow PRO to unlock all advanced features and enjoy a seamless transfer experience.

Standard Apple Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Key features

- Physically isolated transfer
- Military-grade encryption (AES, SM4)
- Cross-platform compatibility
- Offline data sharing
- Secure transfer of text and small files

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| DunFlow PRO Monthly | $1.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| DunFlow PRO Lifetime | $9.99 | one-time |



## Frequently asked questions about DunFlow

### What is DunFlow?

DunFlow is a utility app that enables secure, offline data transfer between devices using a unique optical flow technology. It displays a visual data stream on one device that is captured by the camera on another to complete the transfer.

### Does DunFlow require an internet connection?

No, DunFlow is designed for physically isolated transfer. It does not require Wi-Fi, cellular networks, or Bluetooth pairing, making it ideal for offline environments.

### What types of files can DunFlow transfer?

DunFlow is best suited for transferring text, links, and small files. Due to limitations in screen and camera refresh rates, it is not suitable for large files like HD videos.

### Is my data secure with DunFlow?

Yes, DunFlow utilizes military-grade AES and SM4 encryption algorithms to ensure your data is protected at the highest level, preventing network eavesdropping and privacy leaks.

### What devices does DunFlow support?

DunFlow is available for iPhone and iPad devices.

### How often is DunFlow updated?

The latest version, 1.2.13, was released on September 16, 2026, indicating recent development activity. Users can expect updates to maintain functionality and security.

### What are the benefits of DunFlow PRO?

Upgrading to DunFlow PRO unlocks all advanced features, providing a seamless and enhanced transfer experience. Specific details on PRO features are available within the app.

### Does DunFlow have ads?

Based on the provided data, DunFlow does not contain advertisements. The app is free with in-app purchases for advanced features.

## Version history (last 1 release)

### 1.2.13 — 2026-09-16

No release notes.

## More apps by 敏 单

- [VoidFlow](https://appshunter.io/ios/app/voidflow/id6758207146)
- [Crumpled](https://appshunter.io/ios/app/crumpled/id6760749419)
- [VoxPixel](https://appshunter.io/ios/app/voxpixel/id6770837216)

All apps by 敏 单: https://appshunter.io/developer/1856430877

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-21.*