Compass Altimeter: Sun & Moon
GPS Elevation & Barometer
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Compass Altimeter is a clean, pro‑grade altitude and compass tool that fuses GPS with (iOS) barometer/absolute altitude for faster, more accurate live readings—ideal for hiking, exploration, landscape photography, and stargazing.
Key Features
• Live altitude: GPS + barometric fusion with accuracy readout
• Relative altitude: set a base point to track ascent/descent
• Compass: True/Magnetic North, localized direction text (NESW), subtle haptics
• Calibration & interference: magnetic interference detection with calibration tips
• Sun & Moon: elevation/azimuth, sunrise/sunset and moonrise/moonset
• Photography aide: golden/blue hour with bearings for better framing
• Coordinates: switch between Decimal and DMS; one‑tap copy
• Sources & accuracy: Auto/GPS/Barometric modes; GPS High/Medium/Low accuracy
• Pressure: live pressure with units (hPa/mmHg/inHg/psi)
• Personalization: m/ft, 12/24‑hour, language, precision display, splash animation
Design & Performance
• Large, legible typography with modern UI
• “Fast‑then‑precise” positioning and smart lifecycle for stability and battery savings
Use Cases
• Hiking and outdoor exploration
• Landscape photography timing (golden/blue hour)
• Astronomy and education
• Travel logging and altitude lookup
Privacy & Permissions
• Location while in use only; used for altitude and sun/moon calculations (no continuous background tracking)
• Motion/Barometer (iOS) improves altitude accuracy
• Preferences stored on device; no personal data uploaded
Disclaimer
• Measurements depend on environment/device and are for reference only
-------------------------------------------------------
Compass Altimeter Subscription Service Introduction:
【Premium Membership Features】
- Red light eye protection display for night use
- Display measurement precision information
- Display environmental magnetic field data in real-time
- New restricted features to be added in the future
Subscription Options:
- Monthly: $1.99/month
- Yearly: $9.99/month (billed annually)
- Lifetime: one-time purchase $19.99
- Payment: Once the user confirms the purchase, the charge will be made to the iTunes account.
- Cancellation: To cancel the subscription, please manually turn off auto-renewal at least 24 hours before the current subscription period ends in 【Settings】 → 【Apple ID, iCloud, iTunes & App Store】 → 【Subscriptions】.
- Renewal: The iTunes account will be charged within 24 hours before expiration. After a successful charge, the subscription period will be extended according to the chosen plan.
- Privacy Policy: https://laysky.com/en/compass-privacypolicy.html
- Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
- User Agreement: https://laysky.com/en/subscription-compass.html
- Paid Membership Service Agreement: https://laysky.com/en/subscription-compass.html
For client usage issues, please contact twtams@163.com for support.
Ratings & Reviews
This update focuses on real-device altitude and compass reliability:
• Improved altitude accuracy handling with clearer barometric precision states
• Added localized wording for uncalibrated altitude precision
• The compass now pauses while the camera is open to avoid background sensor activity and haptic feedback
• Improved startup and settings resilience for saved measurement preferences
• General stability improvements for outdoor use
The developer, 长榕 许, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Fuzhou Knock Dream Technology Co., Ltd.
- Size
- 48.8 MB
- Category
- Navigation
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPad
Requires iPadOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and Simplified Chinese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Compass Altimeter Pro Lifetime $19.99
- Compass Altimeter Pro Annual $9.99
- Compass Altimeter Pro Monthly $1.99
- Copyright
- © 2026 KnockDream Technology