Monitor pool and hot tub water quality with a BLE-YC01 Bluetooth sensor
About this app
An open-source Android app for the BLE-YC01 Bluetooth water quality tester. Connects via BLE to read real-time sensor data and track water quality over time — ideal for swimming pools and hot tubs.
Features
* Live dashboard with real-time readings for pH, ORP, EC, TDS, Free Chlorine, and Temperature * Battery status displayed in the navigation bar * Percentage change shown on each parameter card based on recent history * Temperature chart on the dashboard (last 5 hours) * Pool and hot tub reference lines on all charts (ideal ranges for pH, ORP, Chlorine, TDS, Temperature) * History screen with time-series charts for all parameters (5h, 10h, 2d, 7d, 14d) * Configurable poll interval (default 4 min, max ~5 min before device auto-off) * Configurable save interval for persisting readings to local database * Temperature alert with notification when a target temperature is reached * Auto-reconnect to the last paired device on app launch * All data stays on your device (Room database) — no cloud, no tracking
Supported Device
Model: BLE-YC01 (6-in-1 Bluetooth Water Quality Tester)
This is a white-label device sold under several brand names including Yinmik, Yieryi, Eujgoov, ANKROYU, and RCYAGO. All variants use the same BLE protocol and are compatible with this app. Look for model name BLE-YC01 in the product listing.
Sensors
* pH: 0.1 – 14.0 * ORP: -1200 – +1200 mV * EC: 0 – 20,000 uS/cm * TDS: 0 – 9,990 ppm * Free Chlorine: 0.1 – 4.0 mg/L * Temperature: 0.1 – 80.0 °C
Device Notes
* Powered by 3x AAA batteries * The device auto-powers-off after ~5 minutes without an active BLE connection * Continuous polling drains batteries faster; at the default 4-minute interval, batteries should last several months
Licensed under GPL-2.0-only, by hc51t.
What's New in v1.0
Imported from the F-Droid repository index.
- Initial release.
Version history
Mar 15, 2026 · 10.1 MB · Android API 26–34 · code 1
Imported from the F-Droid repository index.
- Initial release.
SHA-256 d8b3df29f80157c9ddc00082388dc09777b1fb123c990ad2391d9e5503c88e5f
Will it run on your device?
73%
- Runs on a broad range of modern Android versions.
- ABI coverage is focused on newer 64-bit devices.
Installation Guide
Open Settings on your Android device
Go to Security → Unknown sources (or Install unknown apps)
Enable "Allow from this source" for your browser or file manager
Open the downloaded APK file from your Downloads folder
Tap "Install" and wait for installation to complete
Launch the app from your home screen
Make sure to re-enable Unknown Sources restrictions after installation for security.
How to install this safely
How to verify the file you downloaded
Before you install anything, confirm the file is the one described here. On a computer, run shasum -a 256 your-download.apk (macOS or Linux) or certutil -hashfile your-download.apk SHA256 (Windows), then compare the output character-for-character with the SHA-256 on this page. If a single character differs, the file is not the build we recorded — delete it.
What the signing certificate proves
Every Android app is signed with a private key that only its developer holds. The fingerprint on this page is a hash of the matching public certificate, and it proves continuity rather than identity: it tells you a build came from whoever signed the earlier ones. Android enforces this at install time — if a package claiming to be com.yinmik.waterquality is signed with a different key, the system will refuse to install it over your existing copy. A fingerprint that changes between releases is worth pausing on, because a repackaged app that has been modified by someone else cannot keep the original signature.
How to roll back to an earlier version
No earlier build is on record for Water Quality, so there is nothing to roll back to yet. When a second version is published, this section will explain how to move between them safely.
Why we list sources instead of hosting everything
The official store channel is almost always the right choice: it updates automatically and carries the publisher's own distribution guarantees. A direct APK is useful when a device has no store access, when a rollout has not reached your region, or when you need a specific version — and only when the publisher has authorized that copy. APKBrowse does not list pirated, cracked, or unauthorized rebuilds of Water Quality, and a listing is removed when the evidence for it stops holding up.
Get Water Quality
Every source we list for com.yinmik.waterquality is legality-reviewed. Pirated or cracked builds are never offered.
Other sources
F-Droid listing
officialF-Droid builds this app from source and signs it. This is its official listing, with older builds and full release notes.
Source code
verified publisherThe upstream repository this build is compiled from.
We check legality and signature continuity, but device behaviour still varies. Install at your own discretion.
App Information
Security Verification
We record provenance; we do not run malware scans. Verify the hash yourself before installing.
SHA-256 Hash
d8b3df29f80157c9ddc00082388dc09777b1fb123c990ad2391d9e5503c88e5f
Signing certificate
8d1f85dff19a53ea06badab84ca494ce93a50ad03f642141a1424f54963d3227
Permissions Required
What each permission lets Water Quality do. A highlighted one is worth a second look — not necessarily wrong, just worth asking whether this app needs it.
Previous Versions
No earlier build is on record — this is the first release we have listed.
The signing certificate fingerprint for this release is on record, so a build that does not match it did not come from this publisher.
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