Last updated: November 11, 2026

Blood Sugar & Pressure Log ("the app") is made by DuySoft ("we", "us"). This policy explains what happens to your information when you use the app on iPhone.

The short version

• The app has no account. It is free and shows ads.
• Your readings are stored only on your iPhone, and only you can see them. We never receive your readings.
• Ad and analytics partners receive device and usage information (described below), but never your readings, medications, notes, health answers or anything you type, and your health information is never used for ads.
• Readings leave your phone only when you choose to share a file or send us an email.

Information you enter

You can enter blood pressure, pulse, blood sugar and blood oxygen values, along with the date and time, arm and position, tags, medication names, notes and reminder times. You type these in yourself. The app does not measure anything and does not read data from other apps or devices.

This information is stored in the app's private storage on your iPhone. It is protected by iOS data protection and is excluded from iCloud and computer backups, so it is not copied to Apple's or anyone else's servers. If you delete the app, this information is deleted too.

Ads, analytics and the information they collect

To keep the app free, it shows ads and uses analytics. These services run inside the app and collect information directly from your device:

• Advertising: Google AdMob (privacy policy) and its bidding partners Meta Audience Network (policy), Pangle (policy), Mintegral (policy) and AppLovin (policy).
• Analytics and crash reports: Google Firebase Analytics and Crashlytics (policy).
• Install and ad measurement: Adjust (policy), Meta (policy) and TikTok for Business (policy).

What they may collect: your device's advertising identifier (only if you allow tracking when iOS asks), other device identifiers, approximate location derived from your IP address, device model and system version, which ads were shown or tapped, ad revenue, crash and performance data, and simple app actions such as "onboarding finished", "entry saved" or "report shared" (no values or content).

What they never receive: your blood sugar, blood pressure, pulse, oxygen, weight or other readings, units, tags, medication names, notes, health answers, profile details or anything else you type. We do not use, sell or share your health information for advertising, marketing or data mining.

Your choices: iOS asks whether the app may track you; you can change this any time in iOS Settings → Privacy & Security → Tracking. In the EEA and UK you can change your ad consent in the app under Settings → Ad privacy choices. To report an ad, use Settings → Report an ad.

The app does not access your camera, microphone, contacts, photos, precise location or Apple Health.

When information leaves your phone

Only when you take one of these actions:

1. Share with your doctor: you create a PDF or CSV report and send it with the iOS share sheet (for example Mail, Messages, AirDrop, Files or Print). The report goes only where you send it. Once it is sent, the privacy of that copy is governed by the service or person you sent it to.
2. Backup file: you create a backup file that is encrypted with a passphrase you choose (AES-GCM). You decide where to save it, for example Files or AirDrop. We never see the file or your passphrase, and we cannot recover a forgotten passphrase.
3. Feedback email: if you choose "Send feedback", your Mail app opens a message to us. We receive only what you write and send, plus your email address. We use it only to reply to you and to improve the app, and we delete it when it is no longer needed.

Notifications

If you set reminders, the app schedules local notifications on your iPhone. Reminder times and texts are not sent to any server. You can turn reminders off in the app or in iOS Settings.

Children

The app is intended for adults (18 and older). It is not directed to children under 13, and we do not knowingly collect information from children.

Your choices and rights

Your readings stay with you, and you control them directly in the app:

• Edit or delete any reading at any time.
• Delete everything in Settings → Your data → Delete all data, or by deleting the app.
• Export your readings as PDF, CSV or an encrypted backup file.

If you live in a US state with privacy laws (for example California, under the CCPA/CPRA) or in the EEA/UK, you have rights to know about, access, correct and delete personal information, and to opt out of targeted advertising (deny tracking in iOS, or use Ad privacy choices). Device and ad information is held by the partners listed above under their own policies; contact us below and we will help with a request.

Health information

The app is a personal log and is not a medical device. We are not a health care provider. Your readings are never sent to us or to any ad or analytics partner.

Changes to this policy

If we change this policy, we will update the date above and, if the change is significant, tell you in the app's release notes. We will not collect new kinds of data without updating this policy and the App Store privacy label first.

Contact

DuySoft

Email: support@duysoft.org