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No. Your Android phone can act as the gateway completely free of charge. Simply install the thermotrack.io app, leave your phone near the sensors, and it will collect and upload all readings automatically. The dedicated hardware gateway is an optional upgrade for permanent installations where you'd prefer not to use a phone.

The S02 sensor uses Bluetooth 5.0 LE and can reach up to 20 metres between sensor and gateway. Walls and obstacles inside buildings shorten that, so for larger spaces you can place multiple gateways (or phones) to extend coverage.

Yes — the local event buffer stores up to 5,000 readings on the gateway device itself. This means you won't lose data during internet outages. Once connectivity is restored, all buffered readings are uploaded automatically. For mobile data, the app uses very little data (roughly 1 MB per sensor per month).

Absolutely. Drivers place an S02 sensor in the cargo area of their vehicle. The driver's own Android phone acts as the gateway via Bluetooth. Every reading throughout the route is logged with a timestamp. At the end of the delivery, a full temperature report can be exported as CSV or PDF — providing proof of safe temperatures for the entire journey.

The S02 uses a standard CR2477 or AA battery and typically lasts 18–24 months depending on broadcast interval. The app shows battery level for each sensor and will notify you when a battery is running low so you have plenty of time to replace it.

Yes! The S02 is IP67 rated (water resistant), so it can be placed near a fish tank. Set your target temperature range (e.g. 26–28°C for tropical fish) and thermotrack.io will alert you the moment the temperature drifts — meaning you'll be notified immediately if a heater fails, even while you're asleep or at work.

Yes, absolutely. There are no contracts or lock-in periods. Cancel any time from the Settings screen in the app. Billing is quarterly, so you'll continue to have access until the end of the quarter you've already paid for.

Yes. All data is encrypted in transit (TLS 1.3) and at rest (AES-256). We are GDPR compliant — you can request a full export or deletion of your data at any time. We never sell your data to third parties. See our Privacy Policy for full details.

Yes, because the thermotrack.io app stays permanently connected in the background to read your sensors 24/7, it will use approximately 3–5% of your phone's battery per day for this operation. We recommend keeping your phone plugged in when it is being used as a dedicated gateway — for example, on a dashboard mount in a delivery vehicle.

The S02 sensor is certified to EN 12830:2018, the European standard for temperature recorders used in the transport, storage and distribution of temperature-sensitive goods. Certification depends on the sensor model, so ask us for the certificate and supporting documentation for the model you choose.