This one is not too shabby
Also not bad
| Device | Battery life (claimed) | Geofencing / Safe zones | Initial / Device cost | Monthly / Ongoing cost |
| Spotter Senior GPS Watch (4G) | Up to ~7 days (usage-dependent) (Manuals+) | Yes — geofencing / safe zone alerts built into app (shop.spottergps.com) | €104.94 (as listed on Spotter’s site) (shop.spottergps.com) | Prepaid plans: 3 mo. at €7.00/month, 6 mo. at €6.50/month, 12 mo. at €5.00/month, 24 mo. at €4.50/month (shop.spottergps.com) |
| CPR Guardian III | — (not reliably published in same “days” format) | Yes — “Geo Safety Zones” / location boundaries (CPR Guardian Watch) | £149.98 (device alone) (CPR Guardian Watch) | £24.99/month for full service plan (Silver) including GPS + calling etc. (CPR Guardian Watch) |
| Tranquil GPS Watch | ~1 week (7 days) under average use (SafeWise) | Yes — safe zones / geofencing + “home beacon” features (Tranquil) | $945.00 (one-time device cost) (alzstore.com) | Subscription: $44.95/month (annual plan), or $54.95/month (monthly). (Tranquil) |