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Last updated on: 2026-05-15
Android Apps > Productivity > Change Detection
Change Detection icon

Change Detection

2.2
Bernardo Ferrari
4.03
258 reviews
10,000+
Downloads
Free

Track changes on websites you otherwise would visit frequently for updates

Not recently updated — last update was on 2019-01-01. This app may no longer be actively maintained.
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About Change Detection

Change Detection is a productivity app developed by Bernardo Ferrari.

Download Statistics

Change Detection has been downloaded 25 thousand times. In the last 30 days, the app was downloaded 0 times.

User Ratings

Change Detection is rated 4.03 out of 5 stars. The rating is based on 260 ratings.

App Information

Change Detection is FREE to download. The APK download size is 2.97 MB. The latest version available is 2.2. The last update was on January 1, 2019.

Technical Requirements

Change Detection requires Android 5.0+ or higher. The app has a content rating of Everyone. The app has been available on Google Play September 2018.

Description
Change Detection allows you to monitor any website to receive notifications when it is updated. This app works natively, without the need for any external servers (your data is safe), using all the latest technologies, a great UI and it is open source.

Use cases:
- Teacher says grades will be published "soon", but no one knows what "soon" means and you are tired of reloading.
- You are working with a server and wants to know the result from a request, periodically.
- You are waiting for updates on an Exam, like if something was postponed or updated.

It also also showcases all the Android Architecture Components working together: Room, ViewModels, LiveData, Paging, WorkManager and Navigation.

When a change is detected on background, a notification (alert) is displayed. It currently doesn't work with login pages, but contributions are welcome. There are 3 viewers for the app, a text viewer that compares website history in a git-like way, with line by line added/removed and green/red, a pdf viewer which displays multi-paged PDFs on a carousel like interface, inspired by Lottie's open source sample app, and an image viewer, similar to the Pdf viewer, but with support for tiling (which allows heavy pictures to load faster and with lower memory).

Features:
✅ Notification when a website changes
✅ Monitor multiple websites
✅ Visual difference of all modifications (diff)
✅ Browse different versions of a site, PDF, image, or a text file.
✅ Does not require any permissions.
✅ Gradient color customisations for each item.
✅ Material design and latest Android Architecture Components.
❌Doesn't work with pages that require login.

✨ Source code is available here:
https://github.com/bernaferrari/ChangeDetection

Recent changes:
Backup functionality, new add/edit dialog, app size is 50% lighter and a lot of internal improvements.
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More data about Change Detection

Price Free to download
Total downloads 25 thousand
Recent downloads 0
Rating 4.03 based on 260 ratings
Ranking Not ranked
Version 2.2
APK size 2.97 MB
Number of libraries 10
Designed for Android 5.0+
Suitable for Everyone
Ads NO ads

App Performance Report

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Google Play Rating history and histogram

160
30
15
22
30

Downloads over time

Change Detection has been downloaded 25 thousand times. Over the past 30 days, it has been downloaded 0 times.

Changelog of Change Detection

  • Jan 27, 2020Installs10,000+ installs
  • May 6, 2019Installs5,000+ installs
  • Jan 1, 2019UpdateVersion 2.2
  • Oct 7, 2018Installs1,000+ installs
  • Oct 1, 2018UpdateVersion 2.1
  • Sep 23, 2018UpdateVersion 1.9
  • Sep 14, 2018New AppVersion 1.8 in PRODUCTIVITY for Free
Show more Show less

Developer information for Bernardo Ferrari

Bernardo Ferrari

bernaferrari2+cd@gmail.com

N/A

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Comments on Change Detection for Android

★★★★★ Navya Sri · Jun 27, 2020
It's great. It does the work what it says. Loved it. Great works by the developer.
★★★★★ Chad Kumlien · Mar 16, 2019
This Dev is top-notch! The app is beautiful. The detection is solid. I had to reach out to Bernardo to understand how a site is not work. His response was super, he explained the technology and why the site doesn't play well.
★★★★★ Mark Magno · Mar 18, 2021
Amazing app! It's the perfect app I am looking for, and I am amazed that it is only FREE! Thank you for this!!!
★☆☆☆☆ itneveroccurred · Oct 10, 2022
Doesn't work even though I can see new stuff popping up on my chosen websites to monitor.
★★☆☆☆ Ardianto S. Wijaya · Feb 2, 2019
Not working if the website used Cloudflare protection
★★☆☆☆ No Name · Oct 23, 2019
Does the job just fine, but shortest interval is 15 minutes. Not very useful.
★☆☆☆☆ Erik Neff · Nov 9, 2020
Would not recommend, generates lots of notification spam that effectively amount to false positives. I want the app to stay silent unless a meaningful change had occurred. In reality, I notified all the time just to say it checked and no update was detected. Furthermore, there was no way I could see to restrict what's being compared. These seem like fixable shortcoming, but in its current incarnation, it's not usable.

Google Play Rankings for Change Detection

This app is not ranked

Technologies used by Change Detection

Change Detection is requesting 4 permissions and is using 11 libraries.

Permissions

Network communication
view network connections, full network access
System tools
run at startup, prevent phone from sleeping

Ad network libraries

None found

Social libraries

None found

Development tools

Android Jetpack core Android Library IconAndroid Jetpack core Android Architecture Components Android Library IconAndroid Architecture Components Android Jetpack VersionedParcelable Android Library IconAndroid Jetpack VersionedParcelable Android Jetpack Annotations Android Library IconAndroid Jetpack Annotations Android Jetpack Widgets Android Library IconAndroid Jetpack Widgets Android Jetpack AppCompat Android Library IconAndroid Jetpack AppCompat Kotlin Android Library IconKotlin Android WorkManager Android Library IconAndroid WorkManager Material Dialogs Android Library IconMaterial Dialogs Subsampling scale image view Android Library IconSubsampling scale image view
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