# Mainstream: Transfer Data — Send files by camera, offline

> Send files by camera, offline (iPhone/iPad app by Richard Russell.)

- Source: https://appshunter.io/ios/app/mainstream-transfer-data/id6824097275 (this page in markdown: same URL + `.md`)
- Developer: [Richard Russell](https://appshunter.io/developer/6778920100)
- Category: Utilities, Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 1 MB
- Languages: American English
- Released: 2026-10-31
- Data updated: 2026-11-02

## What is Mainstream?

Mainstream sends data from one phone to another as an animated colour code. One phone shows the code, the other points its camera at it, and the transfer starts on its own. It works with no Wi-Fi, no mobile data and no Bluetooth pairing, so it works in airplane mode, abroad, underground or anywhere two phones can see each other.

Send almost anything:
• Photos and videos from your library, or a new photo
• Audio recordings
• Any file from Files
• Text, with one-tap paste
• A contact card
• A Wi-Fi network, which the other phone can join with one tap
• Your current location

Mainstream also appears in the share sheet, so you can send straight from Photos, Safari, Files and other apps.

Built for real conditions:
• A live gauge shows how much has arrived and the current speed, and whether the sender can go denser or should back off
• Error correction and a fountain code mean missed frames only cost time, never the transfer
• Pinch to zoom, tap to focus, or set focus by hand, including macro on phones with a close-focusing ultra-wide camera
• On supported iPhones, read with two cameras at once
• Payloads are compressed before sending, and photos and videos can be shrunk further with one tap

## Is Mainstream safe?

Not enough ratings yet to assess Mainstream.

## Is Mainstream legit?

Mainstream: Transfer Data has limited verification signals. The AppsHunter Legitimacy Score for Mainstream is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 2.1 — 2026-10-31

No release notes.

## More apps by Richard Russell

- [Stacks: Offline Reader](https://appshunter.io/ios/app/stacks-offline-reader/id6778920098)

All apps by Richard Russell: https://appshunter.io/developer/6778920100

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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 2026-11-02.*