Logalyst Privacy Policy

Effective September 23, 2026

Logalyst is an iPhone and Apple Watch app for logging health data into Apple Health. It was built to keep your data on your devices. This policy explains what the app accesses, where that data goes, and how to remove it.

The short version

• We don't collect your data. Logalyst has no accounts, no servers of its own, and no analytics, advertising or tracking.
• Your health data stays in Apple Health. The app reads and writes it only on your devices, and never sends it anywhere.
• Your saved foods, recipes and settings sync through your own iCloud account, end-to-end encrypted, so only your devices can read them. We can't see them.
• The only other thing that leaves your device is a product barcode number, and only when you scan a food that isn't one of your saved foods. It goes to Open Food Facts to look up the food's nutrition.

Health data

With your permission, Logalyst uses Apple Health (HealthKit) to:

• Save the measurements, intake, symptoms and events you enter, such as blood pressure, blood glucose, weight, water, nutrition, symptoms and sexual activity.
• Read that same kind of data to show your history, prefill your last reading, show today's totals and charts, and power the widgets and Watch complications. Nutrition totals include data that other apps have saved to Health.
• Suggest goals: if you open Suggest Goals, read your height, weight, date of birth, sex and resting energy to estimate daily water, calorie and nutrient goals. The estimate is worked out on your iPhone. Your activity level, weight goal and whether to use resting energy are saved with your settings (see Data stored on your device and in iCloud); your measurements aren't saved anywhere else.

You choose which types of data Logalyst can read and write, and you can change this at any time (see Your choices).

Health data is read and written only on your iPhone and Apple Watch. Logalyst never sends it to us or to anyone else, and never uses it for advertising, marketing or data mining. It is never sold or shared. If you have turned on iCloud syncing for Health, Apple handles that under Apple's Privacy Policy, not Logalyst.

Data stored on your device and in iCloud

Logalyst keeps a few things in its own storage on your device:

• Settings: your preferred units, daily goals and limits, favorite metrics, preset amounts, log reminder schedules, and your Suggest Goals answers.
• My Foods and recipes: the foods you save, with their nutrition per serving and barcode, and the recipes you make from them.

If you're signed in to iCloud, the iPhone app also keeps a copy of these in the app's private database in your iCloud account, so they follow you to a new iPhone or your other iPhones. Every field is end-to-end encrypted with keys only your devices hold, so neither Apple nor we can read them. Apple can see only that the records exist, their size and when they changed. If you're not signed in, or turn iCloud off for Logalyst in Settings, they stay on your iPhone only. Because the keys are in your iCloud Keychain, if you ever reset your end-to-end encrypted data, the copy in iCloud can't be read any more, but the copy on your iPhone is kept.

Log reminders are scheduled by your iPhone itself, not sent from a server. They can show how much of a daily goal (like water) you have left, or when you last logged a metric, which appears on your Lock Screen unless you hide notification previews in Settings.

Your favorites, daily goals and presets sync between your iPhone and Apple Watch directly over Apple's Watch connection. The Watch doesn't use iCloud for these.

Camera

If you take or choose a photo of a meal, Apple Intelligence's on-device model estimates the foods in it on your iPhone. The photo isn't sent anywhere or kept, and nothing is logged until you check it and tap Log.

If you scan a barcode or a nutrition label, Logalyst uses the camera to read it. Barcodes and label text are recognized on the device, and camera images are never saved or sent anywhere. If you choose a photo of a label instead, the app reads only that photo, on the device, and doesn't keep it.

Open Food Facts

When you scan or type a barcode that doesn't match one of your saved foods, Logalyst looks it up in Open Food Facts, a free, open food database run by a nonprofit. To do this, the app sends Open Food Facts:

• the barcode number, and
• the app's name, which Open Food Facts asks apps to include.

As with any website, Open Food Facts also receives your device's IP address when it answers the request. Nothing else is sent: no health data, name, account or device identifier. Open Food Facts' handling of this data is covered by the Open Food Facts privacy policy.

If you don't scan or type barcodes, Logalyst never connects to the internet, except to the App Store to show and buy tips when you open the Tip Jar.

Tips

If you leave a tip in the Tip Jar, the purchase is handled entirely by Apple through the App Store. Logalyst never sees your payment details, and doesn't keep a record of tips.

Information from Apple

If you agreed to share app analytics or crash reports with app developers in your device's settings, Apple may give us anonymous crash reports and usage statistics. Apple collects these, not Logalyst, and you can turn them off in Settings › Privacy & Security › Analytics & Improvements.

Your choices

• Change Health access: open the Health app, tap your profile picture, then Apps › Logalyst. You can also go to Settings › Apps › Health › Data Access & Devices › Logalyst.
• Turn off camera access: go to Settings › Apps › Logalyst.
• Delete entries: swipe to delete in Logalyst's History tab, or delete them in the Health app.
• Delete saved foods and recipes: remove them in Add Food. They're removed from iCloud too.
• Stop syncing with iCloud: go to Settings › [your name] › iCloud, tap See All under Saved to iCloud, and turn off Logalyst.
• Remove everything: deleting Logalyst removes its settings, saved foods and recipes from your iPhone. To remove the copy in iCloud as well, go to Settings › [your name] › iCloud › Manage Account Storage › Logalyst and delete its data. Entries you logged stay in the Health app until you delete them there.

Children

Logalyst isn't directed at children, and it doesn't collect personal information from anyone.

Changes to this policy

If this policy changes, we will update it here and change the effective date above. If a change affects how your data is handled, we will also say so in the app's release notes.

Contact

Questions about this policy or your privacy? Email support@logalyst.app.