# Sym Junk — Set up your rebreather

> Set up your rebreather (iPhone/iPad app by Rogier Visser.)

- Source: https://appshunter.io/ios/app/sym-junk/id6794658823 (this page in markdown: same URL + `.md`)
- Developer: [Rogier Visser](https://appshunter.io/developer/672667764)
- Category: Sports
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.0 · 59 MB
- Languages: American English, Dutch, German (Germany)
- Released: 2026-08-09
- Data updated: 2026-08-29
- User reviews in markdown: https://appshunter.io/ios/app/sym-junk/id6794658823/reviews.md

## What is Sym Junk?

SymJunk is a fast, offline-first companion for configuring your CCR dive
computer and rebreather head over Bluetooth — so you set everything up calmly on
the surface instead of squinting at tiny buttons on the unit.

CONFIGURE EVERYTHING, OFFLINE
• Edit screens, gases, gradient factors, setpoints, deco and more — all on your
  phone, no connection needed.
• Save presets per category and pick them with one tap.
• Three colour themes; metric or imperial.

ONE-TAP FLEET SYNC
• Mark your handset, HUD and CCR head, then push your settings to all of them in
  a single sync — with a clear before/after overview of exactly what changed.
• The clock and time zone are set correctly on every device.

DIVE LOGS & MAP
• Download your dives and view depth, temperature, pO₂ and tank-pressure
  profiles.
• See your dives on a map. Add your own dive-site name and location to any dive
  — with type-ahead so your favourite sites autofill.
• Dive-site totals, ranked by number of dives.

OFFLINE MAPS
• Download a dive area for offline use, so the map works with no signal.

REBREATHER TOOLS
• Live CCR-head monitor: cells, setpoint, tank pressures, battery health and
  more.
• Vacuum/positive test with an adjustable timer and live loop Δp.
• Calibration guide that follows the head live.
• Step-by-step assembly and calibration checklists.

WAYPOINT PLANNING
• Plan waypoints on a map and upload them to your computer.

PRIVACY BY DESIGN
• No account, no ads, no tracking. Your data stays on your phone. The only
  internet use is map tiles and place-name search.

SymJunk is an independent hobby app and is NOT affiliated with, or endorsed by,
Halcyon or Oxygen Scientific. All brand and product names belong to their
respective owners. This is experimental software and not a dive-safety device —
always verify every setting on the dive computer itself and rely on your training
and certified equipment.

Free to use, with an optional one-time Pro upgrade for fleet sync, waypoint
upload and the live head monitor.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Divejunk | $6.99 | one-time |



## Version history (last 5 releases)

### 1.4.0-252 — 2026-08-27

Added tags
Added onboarding explanation

### 1.3.0-245 — 2026-08-24

Solved first sync issues

### 1.2.0-233 — 2026-08-18

Logbook import update and tools.
Green flash update
Stability updates
Added Language support

### 1.1.0-216 — 2026-08-17

Added Blend Junk app qr code support. 
Several stability fixes

### 1.0.3-188 — 2026-08-10

Battery readings now in volts, percentage is indication
Log updates

## More apps by Rogier Visser

- [Qusax](https://appshunter.io/ios/app/qusax/id672667761)
- [CCR Junk](https://appshunter.io/ios/app/ccr-junk/id6757073023)
- [My Divejunk](https://appshunter.io/ios/app/my-divejunk/id6758464173)
- [BlendJunk](https://appshunter.io/ios/app/blendjunk/id6761421435)
- [Hide Game](https://appshunter.io/ios/app/hide-game/id6762065305)
- [DivePlot](https://appshunter.io/ios/app/diveplot/id6786434589)

All apps by Rogier Visser: https://appshunter.io/developer/672667764

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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 2026-08-29.*