Nightbell

5 Downloads 16 Views v3.7 2.29 MB 4.1+

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(2.29 MB)

Editor's Overview

Nightbell is a development application developed by river, packaged as a single Android APK of version 3.7 weighing in at 2.29 MB. The package targets Android 4.1+ and above. Below you'll find the publisher's own description, a quick spec sheet, and a short buyer-beware checklist so you know exactly what you're installing before tapping download.

Install Checklist

Only download through the button on this page — never from third-party mirrors or shortened links, which are the most common way malware spreads.
File size is a light 2.29 MB, so it installs quickly even on modest connections.
This build is signed by "river" — always verify the developer name matches what's listed on the app's official store page before installing an update.
After install, Android may prompt you to allow "Install from unknown sources" — approve only this one install, then revoke the permission in Settings > Apps > Special access.
We link directly to the APK file or the publisher's repository; we do not modify the binary. Always run a virus scan after any sideloaded install.

About this app

Point Nightbell at anything that answers over HTTP, or at one element on a
rendered web page, and it watches it, charts it, and gets loud when it
breaks.

There is no server and no account. The phone in your pocket does the
checking, and your API tokens and target URLs never leave the device.

Three kinds of monitor:
- Status check: hit a URL, assert on the status code.
- Request and response: pick the method, set headers and a body, assert
on what comes back (contains, equals, regex, or a JSON field by path).
- Page element: load the real page in an embedded browser and watch DOM
nodes you picked by tapping them.

Urgent alerts arrive as a full-screen red page with a looping alarm that
keeps going until you acknowledge it, and it wakes the screen even if the
phone is locked. A first-launch screen walks through the four Android
grants a paging app actually needs (notifications, unrestricted battery,
full-screen intent, Do Not Disturb access), because two of them have no
system dialog and have to be opened by hand.

A home-screen widget shows the worst monitor first. Settings let you shape
the alert policy: what counts as down, sound, haptics, escalation, and
quiet hours.

Signed with the developer's own key. No Play Store listing.

Details

Version	v3.7
Size	2.29 MB
Developer	river
Category	Development
Package	me.river.nightbell
Android	4.1+
Last Updated	Oct 29, 2026
Downloads	5

Frequently Asked Questions

Is Nightbell free to download?
Yes. The APK file linked from this page is free. The developer may offer in-app purchases once installed, but obtaining the installer itself costs nothing.

What Android version does Nightbell require?
Android 4.1+ or newer. Installing on older devices may cause crashes or refuse to install.

Is Nightbell safe to install?
We link to the exact APK published by river. We do not modify the file. Still, as with any sideloaded app, scan it with a reputable antivirus before opening it, and only grant permissions the app genuinely needs.

How do I update Nightbell?
Install the newer version on top of the old one — Android will keep your data. If the signature differs, uninstall first (you may lose local progress).

Why is the app not installing?
Common causes: not enough storage, an older Android version than 4.1+, or a conflicting build already installed. Free up space, check your OS version, and uninstall any previous copy before retrying.

How to Download & Install Nightbell

Tap the Download APK button above and save the file to your device.
Open your device Settings → Security (or Apps → Special access → Install unknown apps) and allow your file manager or browser to install unknown apps for this one file only.
Open the downloaded me.river.nightbell.apk file from your Downloads folder.
Tap Install and wait for Android to finish.
Open «Nightbell» by river and grant only the permissions it actually needs.
Revoke the "unknown sources" permission once you are done installing.

Note: this page hosts or links to the installer only. The application name, icon and description are provided for identification. All trademarks belong to their respective owners.