# Bike Guardian — Rear-view bike safety

> Rear-view bike safety (iPhone/iPad app by Andrew Marc.)

- Source: https://appshunter.io/ios/app/bike-guardian/id6787766705 (this page in markdown: same URL + `.md`)
- Developer: [Andrew Marc](https://appshunter.io/developer/1853445500)
- Category: Health & Fitness, Navigation
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 31 MB
- Languages: American English
- Released: 2026-07-09
- Data updated: 2026-08-22
- User reviews in markdown: https://appshunter.io/ios/app/bike-guardian/id6787766705/reviews.md

## What is Bike Guardian?

Bike Guardian turns the phone already on your handlebars into a cyclist-assistance companion.

SITUATION WARNINGS
- Object boxes are context, not warnings.
- A rider warning requires a tracked vehicle that is measurably closing over time.
- Visual, spoken, and haptic feedback share one typed situation identity.
- Uncertain car, truck, bus, or motorcycle subclasses are conservatively called vehicle.

REAR GUARD
- Uses your phone cameras to watch the road behind while you watch the road ahead.
- Warns with "vehicle approaching behind" or "fast vehicle approaching behind" only after temporal closing evidence.
- Supports handlebar and seatpost mounting on devices with simultaneous front and back camera capture.

LOCAL EVIDENCE
- Warning transitions and numerical evidence are stored locally.
- Possible pass events inferred from image motion remain explicitly unverified.
- Unverified pass candidates never become automatic community map facts.
- Raw video sharing is off unless you explicitly opt in.

IMPORTANT
Bike Guardian is a rider-assistance tool, not autonomous control. It does not replace your attention, judgment, or local traffic law. Silence is not proof that the road is clear.


## Version history (last 3 releases)

### 1.2 — 2026-08-21

- Added an independently licensed, on-device production vehicle detector using Apple's checksum-pinned Core ML model.
- Connected rider-confirmed community hazards to the production service with offline retry and server-enforced access controls.
- Kept visual boxes as context while tracked closing motion remains required for rider warnings.
- Improved release checks so every shipped build must contain the approved detector and exclude development-only models.

### 1.1 — 2026-07-11

- Added evidence-backed vehicle-closing warnings for the forward ride view and Rear Guard.
- Stabilized vehicle identity across noisy car, truck, bus, and motorcycle labels.
- Unified visual, spoken, and haptic feedback under one warning identity.
- Added visible warning-pipeline health and stale-inference protection.
- Kept collision, crossing, squeeze, door-opening, and close-pass claims disabled until their geometry is validated.

### 1.0 — 2026-07-10

No release notes.

## More apps by Andrew Marc

- [Hold Down the Button](https://appshunter.io/ios/app/hold-down-the-button/id6755971735)
- [Cosmic Journey Into Space](https://appshunter.io/ios/app/cosmic-journey-into-space/id6761701418)

All apps by Andrew Marc: https://appshunter.io/developer/1853445500

---

*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 2026-08-22.*