Cyclers app is available for purchase on Google Play Store and App Store.

Google Play Store:
To make purchases from the App Store you need at least one payment method set up
directly in your App Store account. 

How to add a payment method to your Google Play account

1. Go to play.google.com.
2. At the top right, click your profile icon.
3. Select Payments & Subscriptions  Payment Methods.
4. Select Add a Payment Method.
5. Follow the steps on the screen. The new payment method will be added to your Google account.

   Source: https://support.google.com/googleplay/answer/4646404?hl=en&ref_topic=3365267
   

App Store:
To make purchases from the App Store you need at least one payment method set up
directly in your App Store account. 

How to add a payment method on your iPhone or iPad:     

1. Open the Settings app.
2. Tap your name.
3. Tap Media & Purchases, then tap View Account. You might be asked to sign in with your Apple ID.
4. Tap Manage Payments.
5. Tap Add Payment Method.

   Source: https://support.apple.com/en-us/HT201266