If you have a code for TimeSync lifetime subscription, you can redeem the subscription in the Billing page inside your TimeSync account.
Here's how:
1. Log in to your TimeSync dashboard. If you haven't created one, sign up here.
2. Top right corner > Billings.
3. In the Subscription tab > TimeSync's View button > Upgrade.
4. Click Subscribe
5. In the Checkout page > Navigate to 'Have a promo code?'
6. Paste code you received > click Apply
7. Done! You now have your lifetime subscription.