Monitor Your Vivarium,
Anywhere, Anytime
Merlin's Keeper connects to temperature and humidity sensors inside your vivariums and terrariums, giving you live readings, historical graphs, and a full care log for every animal — from corn snakes to tarantulas to giant African millipedes.
Live Monitoring
Real-time temperature and humidity from up to three sensors per device, with configurable alert thresholds.
Historical Graphs
24-hour, 7-day and 30-day trend graphs so you can spot patterns and troubleshoot issues fast.
Automated Environment Control
Pair with a Merlin's Keeper ST to automatically control heating, misting, lighting and ventilation based on live sensor readings and scheduled day/night cycles.
Animal Tracking
Log feeds, moults, medical events and photos. The calendar keeps every animal's history in one place.
Care Guides
Community-maintained husbandry guides covering temperatures, humidity, feeding and vivarium setup.