Seems to be having some issues with latest version of Android Awaiting update for that version. You choose from one of five bell sounds, most a single note. Or choose from notifications sounds supported by your phone. Also choose at what hour to start and at what hour to end the chimes during the day, so your chime won't go off while you sleep.
The app is totally safe to download. Tonyc is the developer of Simple Chime that can be found in the Tools category. The most recent update was on Oct 5, 2018 and this application was downloaded and installed by over 1K users.
Google Play displays that the app is rated 3.8 by its users. Get the installation package of Simple Chime 1.2 that is absolutely free of charge and take a look at users' reviews on Droid Informer.