The Ollee Watch has been tested on the F-91W, A158W, F-84W, A159W, W-59, A171W, A163W and A164W models from Casio. Any watch movement that uses Module 593 is compatible.

Yes — most watch faces and features work fully without having to use the mobile app. The only exception is the Sunrise/Sunset face, which needs location data from your phone. Some system settings also require the mobile app to configure.

No - but an account is required if you want to log and track your step counts, heart rate, and temperature data, as well as events.

By default you must turn on the Bluetooth manually by holding the ALARM button while on the Clock face, or by tapping the watch until the LAP symbol starts blinking. The Bluetooth will turn off automatically after each session with the app. You can enable Bluetooth to be always on in the settings, but it consumes a bit more battery life and isn’t as responsive as when you turn it on manually.

If your Ollee Watch has the NFC tag installed, you can tap it against any NFC-enabled device to trigger a programmed action. Due to the small antenna, range and performance may vary — you’ll need to find the “sweet spot” for your device. Note some devices might not be able to read the tag at all. The tag uses a programmable NTAG213 chip, and you can customize it using apps like NFC Tap (iOS) or NFC TagWriter (Android).

Note the NFC tag only works on pure resin based watches like the F-91W. A158W models with chrome-plated resin and steel straps attenuate the NFC signal too much.

Here is a good video that describes an alternative way to install the NFC (proceed at your own risk!), as well as some of the use cases: https://www.youtube.com/watch?v=aGn2_zP8GI8

The user manual is built into the Ollee Watch app! Tap any of the apps in the Faces tab to learn how to use each watch face, or go Settings > User Manual to access the entire manual.

The battery life depends on how your Ollee Watch is configured and usage patterns. With daily use the default settings provide about 10 months of battery life. There are different presets you can select in Settings > Device in the mobile app, which can extend the battery life up to 3 years.

To factory reset the watch press all three buttons at the same time quickly to enter the display test screen. On this screen hold the ALARM button and it will show the battery voltage screen. Hold the ALARM button again to reset the watch to default settings and clear all the data.

There is no dedicated heart rate sensor on the Ollee Watch. The way the heart rate face works is like a pulsometer. When you start a heart rate measurement, it requires you to physically count your pulse for 20 beats, then stop the measurement. Depending on how long it takes to count 20 beats, the heart rate face then calculates your BPM.

Whenever a watch is opened, the water seal is slightly compromised - this includes pre-installed watches from us! It’s recommended to take some precautions - washing hands, exposure to rain and sweat is fine - but it’s not recommended to shower, go swimming, or enter hot humid environments (like saunas) with it after the modification. There are no warranties by Ollee Watch for water damage!

If you want to make your gasket seal more reliably when installing the Ollee Watch mod, you can consider using gasket grease as demonstrated here - Watch gasket grease video.