Read with confidence
See altitude, accuracy, signal status, and bearing at a glance.
Field altimeter for iPhone
Know your altitude.
Keep the moment.
Crestline makes altitude easy to read and simple to record. Share only what you choose, with precise coordinates off by default.
Example altitude · accuracy ±8 m
552m
Website illustration · Example data
Reliable first, memorable second
A clear instrument for the places that matter.
Crestline is designed for quick outdoor reading without turning a focused utility into a social network.
Record the moment
Save a single-location record, add a photo, and return to the details that made the place memorable.
Share by choice
Create a data card or photo card. Review visible photo content and location choices before exporting.
Built with restraint
Your field data stays yours.
Your records, photos, settings, and share drafts are stored on your iPhone. Place-name lookup uses Apple’s service; opening another map or sharing content is initiated by you. This launch version has no third-party advertising. Read our privacy policy for details.