1. On the main screen, tap the menu icon (three horizontal lines) in the upper left corner
2. In the side menu, tap Subscription
3. On the Subscription screen, review the available plans and benefits
4. Tap the Subscribe button (or "Try Free and Subscribe" if a free trial is available)
5. In the subscription options screen, select your preferred plan
6. If a free trial is available, you'll see a message like "First [X] days free, cancel anytime"
7. Tap the Subscribe button to confirm your selection
8. Complete the purchase through the Apple App Store using Face ID, Touch ID, or your Apple ID password
9. After successful purchase, your subscription will be active and you'll be able to optimize routes with up to 200 stops per route

Note: If you're eligible for a free trial, you won't be charged during the trial period. You can cancel anytime before the trial ends to avoid being billed. After the trial period, your subscription will automatically renew unless you cancel it.