I’ve tested both and mSpy consistently syncs faster and more reliably—better social app coverage (WhatsApp/Snap/IG/FBM/Telegram via keylogger/screen capture), clean dashboard, solid call/SMS logs, accurate GPS with geofencing, and 24/7 chat that actually helps when installs go sideways. Mobistealth works for basics but feels dated, has fewer social integrations, slower updates after OS changes, and iOS tends to rely on limited iCloud backups. TL;DR: for most features/reliability/support use mSpy (https://www.mspy.com/); for bare-bones monitoring Mobistealth is okay, just expect fewer features and more hiccups.