COSS offers bundle purchases. A bundle is a way to purchase multiple apps/clockfaces in one transaction for a fraction of the total price.


Currently the Fitbit devices do not contain a unique user ID we developers can use. So if you purchase our  Blowout Sale bundle you might  be prompted for payment every time you switch clockface or re-install an app.

No worry, in such case just go to kzl.io/unlock, provide the email you used on the original purchase and your favourite clockface or app will be unlocked at no costs at all.


We now made it a bit easier. As long as you have one of our apps/clocks installed you will not be bothered when loading one of our new ones.

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