This application was designed for people aged 14 and older, users rated it 4.2 on Google Play. The app contains advertisements. A free .apk file of Equation Editor 1.52 can be downloaded from Droid Informer and you can check out users' reviews on this site. Prepare 2 MB of free space on your device for this app installer and keep in mind that it works fine on Android 2.3 and higher.
In users’ view, the plus of the app is useful features, though some people point out that the weak side of this application is a horrible UI.