● Fridge & freezer monitoring
ColdMinder monitors recorded air temperature in fridges, freezers, and wine fridges, then shows the latest received readings, a likely cause when the data supports one, and what to check next.
What it says
The first thing ColdMinder shows is what matters: whether recorded air is in range, what may have changed, and what to check.
Needs you
You caught the kitchen fridge warming.
The pattern looks like a door left open. Check the door now.
Illustrative app example · not a live reading
Built around the job
Catch a warming fridge before the food does.
Choose a kit →Away mode watches the cabin and sends one measured daily summary.
Check the fit →Turn a warm-fridge complaint into a dated record and a ready letter.
See the evidence →Trace records a cooler or insulated case, and shows plainly when live coverage stops.
Meet Trace →Placement and set ranges that match the cabinet.
Check the fit →Measured, dated, ready to share
Pick who it's for — a repair shop or your landlord — and ColdMinder drafts a dated letter from the record: measured findings, charts with the window burned in, your own note kept separate, and an optional read-only record link that needs no login. Nothing is sent until you send it.
● Kitchen fridge · Elm St rental
The kit
Plug in the gateway, place the wireless pucks, and let the app guide the rest.
Step 1 of 3
The gateway connects to nearby sensors and tracks the appliance's power use at the outlet. Your appliance can plug into it.
Step 2 of 3
Place wireless temperature-and-humidity sensors on a shelf, in the door, or in the freezer. The app shows how recorded air differs by location.
Step 3 of 3
ColdMinder normally stays quiet while recorded air remains within the set range. Separate battery or connection alerts can still appear. When a temperature alert fires, it includes a likely cause when the data supports one and what to check.
Vented lid for appliance air · typically about a year on a coin cell with on-board memory · freezer-rated shell down to −4 °F (−20 °C) · optional peel-and-stick ring
The gateway plugs into a nearby wall outlet, receives readings from nearby sensors, and measures the appliance's power draw. Your appliance can plug into it.
Temperature, humidity, and motion — smaller than an AirPods case, a year on a coin cell, and memory that rides out outages.
A clear status in plain language, with a detailed chart when you need it.
From $149.See the kits
History
Temperature, humidity, and appliance power appear on one timeline. ColdMinder can mark patterns consistent with a door opening, defrost cycle, or recovery after a warm load; these are estimates. Weekly summaries show the percentage of recorded-air readings in range, estimated door openings, and estimated recorded-air recovery.
ColdMinder names a likely door, compressor, or reporting pattern only when the measurements support it.
For food compartments, see recorded-air time above 40°F beside USDA two-hour guidance. Recorded air is not food temperature or a verdict on food condition.
A gradual increase can prompt a service check even while recorded air remains in range. It is an indication, not a diagnosis or prediction.
The gateway measures appliance draw and places its estimated pace beside the certified rating when the model is known.
Trends, event labels, and comparisons are estimates from your own measurements.
Phone to desktop
See every home from the app, then open the same account on desktop when you want the wider view.
The desktop view for multiple appliances and locations. Swipe the preview to pan the wide view.
Early access
Pre-order · charged today · ships Q4 2026 — hardware from $149 →
Live monitoring needs power and Wi-Fi. Trace live coverage needs a nearby gateway or the open app; stored readings import later and gaps stay visible. ColdMinder is not a safety or medical device.