Altitude GPS - Compass

Mobile software can measure altitude. By opening the Huangxi Altitude Compass, you can accurately measure altitude. The sensitive compass helps you identify direction at any time, making it a great helper for outdoor life. It also has mood, color, and plant survival recording functions to use!
Subscribe:
1. Users can only use functions such as measuring altitude and compass infinitely after paying a subscription；
2. Subscription will be deducted from the user's iTunes account upon confirmation of purchase, free trial for three days, renewable automatically, renewal fee $39.99/year;
3. Users can turn off auto-renewal 24 hours before the end of the current subscription, otherwise the subscription will be automatically renewed;
4. The Apple ID of the automatically renewed subscription will be automatically deducted from the iTunes account 24 hours before the expiration of each billing cycle and the corresponding validity period will be extended;
5. Users manage the subscription service, i.e., they can go to their user accounts to set off automatic subscriptions after purchase.
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