Privacy policy

Last updated October 10, 2026

Tachie is a pacing aid for iPhone. It's built so that your health data stays with you. This policy explains what Tachie stores, what (if anything) reaches us, and the choices you have.

What stays on your iPhone

Everything Tachie records is stored on your iPhone, inside the app:

• Heart rate from your band, one reading per minute, and the zones and energy worked out from it
• Activities and crashes you log, and your morning check-ins
• Your settings and pacing profile, such as resting heart rate and your full day

There's no account and no Tachie server for this data. Like other app data, it's included in your own iPhone backups (iCloud Backup or a computer backup) if you have those turned on; those backups are handled by Apple under your Apple Account.

What reaches us

Only feedback you choose to send from the app (Settings › Send feedback). A message contains:

• The kind of feedback, the part of the app it's about, and what you write
• If you leave "Include app details" on: the app version, iOS version, iPhone model, your band's name and your display settings
• A random ID created when you install the app, used only to limit how many messages one phone can send. It isn't linked to your name, email or Apple Account

Feedback never includes your heart rate, logs or check-in answers. Messages are stored with Cloudflare and turned into notes in a private project tracker so we can act on them. Personal details in what you write are removed first.

What Tachie doesn't do

• No advertising, analytics or tracking tools, and no data brokers
• No selling or sharing of your data
• No Apple Health access

Bluetooth and notifications

Bluetooth is used only to connect to your heart-rate band. Notifications (heart-rate alerts and reminders) are created on your iPhone; they aren't sent from a server.

Your choices

• Export your data any time from Settings › Your data, as two spreadsheets: one row per day, and one per minute of heart rate.
• Delete everything from Settings › Your data: your history, settings, calibration and saved band are deleted from your iPhone, and Tachie starts again from the beginning. Deleting Tachie does the same. Your backups follow your own backup settings.
• Turn off "Include app details" before sending feedback, or don't send feedback at all.
• To ask about or remove feedback you sent, email us and describe the message.

Children

Tachie isn't directed at children under 13 and doesn't knowingly collect their information.

Not medical advice

Tachie is a pacing aid, not a medical device. It doesn't diagnose or treat anything.

Changes and contact

If this policy changes, the date above will change too. Questions: linpatrick11@gmail.com.