ERV helps you track health and wellness data on your own device without a first-party cloud account.
What ERV supports today:
- weight training
- cardio
- stretching
- sauna and cold plunge
- light therapy
- supplements
- programs and unified routines
- body tracking
Privacy and ownership model:
- ERV is local first.
- Sync is optional.
- Supported health payloads are encrypted before relay sync.
- ERV does not operate its own hosted health-data cloud.
- Android cloud backup and device transfer are disabled for app data; use ERV export / backup files when you want an off-device copy.
- Exported files are plaintext unless you encrypt them separately.
- Relay operators may still observe metadata such as timing and your public key.
- ERV can attempt to remove or replace synced relay data, but cannot guarantee every relay permanently deletes retained copies.
- Third-party remote signers, relays, and media hosts are outside ERV's control.
Import / export wording:
- Data interchange is for AI, coach, and script workflows.
- ERV backup JSON is for migration, archival, and restore.