Crystal Alarm is described as 'Offers a personal alarm app for professional use, available on Android and iPhone. Quickly send alarms to colleagues or an alarm central. Optional Bluetooth accessory alarm button available' and is an app. There are more than 10 alternatives to Crystal Alarm for a variety of platforms, including Android, iPhone, Web-based, iPad and Mac apps. The best Crystal Alarm alternative is Signal, which is both free and Open Source. Other great apps like Crystal Alarm are Telegram, Molly, Kitestring and bsafe.
Send Help allows you to send anonymous emergency messages to known recipients for free. Send and receive emergency messages to and from only the people you know.
