Change Detection

Bernardo Ferrari

About this app

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

Ratings and reviews

Great app and amazing developer! ... also I just sent an email requesting a lower interval check time option, and within minutes I had a personal response back explaining why there is not... until recently it was a pretty strict Android restriction to preserve battery, but he states that there have been some recent changes that make some workarounds possible, and he will get to that when he can. Most of us have many demands on our time, but I will be patient and look fwd to a future update.

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.

The app is really very good and it highlights each minute difference. However the only concern which i have is that iam not able to get notifications on my phone's notification bar. It notifies me only when I run this app. It will really be greatful if u can help me to sort this small issue. Rest the app is excellent and a great effort from the developer. Thanks

What's new

Backup functionality, new add/edit dialog, app size is 50% lighter and a lot of internal improvements.