Privacy Policy
- We run no servers. The App does not request network access and does not collect, transmit or keep any of the data you have in the App.
- All analysis happens on your phone, and your data is stored in the App's private storage.
- Data leaves the App only when you choose to export or share it.
- We receive a small amount of information in only three cases: purchase details from Google Play when you buy Pro, whatever you send us when you contact us, and crash and performance statistics from Google Play (which do not include the data you have in the App).
- We do not sell or share your personal information, and we do not use it for advertising.
1. Scope
This policy explains how CPAP Lens (the "App") handles your data. The App is developed and maintained by C. H. Yang, an individual developer based in Taiwan ("we", "us" or the "Developer"). Please read this policy together with the Terms of Use and Disclaimer.
2. We do not collect the data you have in the App
- The App does not request network access and does not connect to our servers or any third-party server.
- The App needs no account, shows no ads and has no built-in analytics, tracking or crash reporting tools.
- We cannot access any data you have in the App.
- The exceptions are described in Section 7: purchase details when you buy Pro, information you choose to send us, and crash and performance statistics from Google Play.
3. Data the App processes on your device
| Data | Source | Purpose |
|---|---|---|
| Machine records (usage time, events, pressure, leak, flow waveforms, settings and similar) | The SD card or folder you choose (including a Google Drive folder) | Nightly data, daily summaries and long-term trends |
| Device model and serial number | Same as above | Telling apart which machine belongs to which user; exported files do not include serial numbers |
| Height | Entered by you, or Health Connect (with your permission) | Calculating body mass index (BMI) with your weight, shown in records, trends and files you choose to export |
| User name or nickname | Entered by you | Telling apart users on the same phone; exported files do not include names |
| Daily log (energy score, alcohol, nasal congestion, sleep location, medication, aids, weight, notes), mask type, settings experiments and supplies | Entered by you | Shown alongside machine data, describing when the two occur together |
| Mask model and start date | Entered by you | Comparing leak against nights with the same mask; shown in trends and included in files you choose to export |
| Travel CPAP nightly values (hours, AHI, pressure, mask seal, leak, model) | Entered by you (copied from that machine's app; this feature can be turned off in Settings) | Shown and counted separately from SD card data; included in files you choose to export when turned on |
| Oximetry records | Files you share or pick from your oximeter's app | Comparing with machine events |
| Weight, height, sleep (including stages), heart rate, oxygen saturation | Health Connect (with your permission) | Weight fills in the daily log and height is used for BMI; sleep, heart rate and oxygen saturation are matched to the night by time and compared with machine events |
The App only reads the SD card or folder you choose and never modifies or deletes any file in it.
4. Health Connect
- The App reads the data types listed above only after you allow them on the Health Connect permission screen. It never writes, changes or deletes data in Health Connect.
- By default Health Connect only provides data from the 30 days before you first granted access. The App reads older data of these types (for example, a height you set earlier or past weights) only if you also allow "access past data", and uses it for the same purposes listed above.
- Data from Health Connect is used only for features the App shows you. It is not used for advertising, is not sold or transferred to any third party, and is not used to decide credit, insurance or employment eligibility. The App's use of Health Connect data follows the Health Connect Permissions Policy, including its Limited Use requirements.
- You can withdraw access in Health Connect settings at any time. Data already read stays in the App until you delete it there.
5. Storage, retention and backup
- Data is stored in the App's private storage on your device, which other apps cannot read.
- Nightly data, daily summaries and daily logs are kept until you delete them. Full-night timelines, event waveforms and raw oximetry data are kept for the latest 90 days by default; you can change this in the App's storage settings.
- If you turn on Android system backup, nightly data, daily summaries, daily logs, user names, device serial numbers and App settings may be backed up by Android to your Google account, under Google's privacy policy. Full-night timelines, event waveforms and raw oximetry data are not included. You can turn off backup in Android settings.
- When you use "Back up data", the backup file is saved where you choose (for example Google Drive or your phone's Downloads folder) and is handled under that service's terms. You can encrypt the backup with a password; an unencrypted backup contains health-related data, so keep it safe.
6. Sharing
- We do not sell, rent or share your personal information.
- When you use Export or Share, the file is handed through the Android share menu to the app or service you choose (including artificial intelligence services) and is handled under the recipient's terms once it leaves the App. Exported files (Markdown, CSV and the PDF usage record) do not include user names or device serial numbers, but they do contain health-related data. Markdown and CSV files also include the text you typed in the Notes field of your daily log; if your notes contain your name or anything else that identifies you, keep that in mind before you share them.
- When you choose a Google Drive folder, files are downloaded to your device by the Google Drive app under Google's privacy policy.
- When you buy Pro, payment is processed by Google Play under Google's privacy policy. The App only checks your purchase status through the Google Play Store app on your device and does not send any health-related data.
7. Information we may receive
| When | Information | Purpose and retention |
|---|---|---|
| You buy Pro | Transaction details Google Play provides to developers under its rules, such as order number, item, time of purchase, price and country or region. We never receive your card or payment details. | Confirming purchases, handling refunds and support, and keeping accounts and tax records; kept for the period required by tax and accounting law |
| You contact us | Your email address, your message, and any files or screenshots you choose to attach (which may contain health-related data) | Answering your question and fixing problems; attachments are deleted within 14 days after the issue is resolved, and messages are kept for up to 2 years. You can ask us to delete them sooner at any time. By choosing to send attachments that contain health-related data, you consent to our processing them for these purposes. |
| Your Android device is set to share usage and diagnostics with Google | Crash and app-not-responding (ANR) statistics Google Play provides to developers, including the program state at the time of the error, device model, Android version and App version. They do not include the data you have in the App. Google collects and provides this information; the App has no built-in reporting tool. | Finding and fixing bugs; kept for the period set by Google Play Console. You can turn off sharing usage and diagnostics with Google in Android settings. |
Please remove anything we do not need before you send it. We will never ask for your name, government ID, medical records or machine serial number.
8. Your choices and rights
- In the App's Settings, you can delete all data for a user.
- When you uninstall the App, Android deletes all of the App's data on your device.
- You can withdraw Health Connect, notification and folder access at any time, and turn off each reminder in the App under Settings → Notifications.
- You can remove the App's home-screen widget at any time.
- For information we receive under Section 7, you can ask to access, correct or delete it, or ask us to stop using it, by emailing us. Additional rights for some regions are in Sections 12 and 13.
9. Security
Data in the App stays on your device; we recommend setting a screen lock to reduce the risk if your device is lost. Some data appears on your screen where others may see it: (a) the App's notifications (log reminders, experiment reminders and supply reminders) may appear on your lock screen, and when several users share the phone, the log reminder shows the user's name; you can hide notification content on the lock screen in Android settings or turn the reminders off in the App; (b) if you add the App's widget to your home screen, it shows the latest night's AHI, usage hours, date and user name. We protect information we receive under Section 7 with reasonable safeguards, and if it is ever compromised, we will notify you and the authorities as required by law.
10. Age
The App is for people aged 18 and over and is not directed at children or minors. We do not knowingly collect personal information from children under 13. A parent or legal guardian may manage data for a minor.
11. Where information is handled
Data in the App stays on your device. Information you send us under Section 7 is received and kept by us in Taiwan, through our email provider. Taiwan's data protection law may differ from the law where you live.
12. Users in the United States
Some states have laws about consumer health data. Our Consumer Health Data Privacy Policy explains what we do and how to make a request. We do not sell personal information or share it for advertising.
13. Users in Australia
You can ask to access or correct personal information we hold about you by emailing us. Information you send us is held in Taiwan (see Section 11). If you are not satisfied with our response to a complaint, you can contact the Office of the Australian Information Commissioner at www.oaic.gov.au.
14. Changes
When this policy changes, we will update this page with a new effective date and notify you in the App of significant changes.
15. Language
This policy is available in Chinese and English. For users in Taiwan or users of the Chinese version, the Chinese version prevails if the two differ; for users elsewhere who use the English version, the English version prevails. In each case, mandatory law where you live applies if it requires otherwise.
16. Contact
Controller: C. H. Yang, individual developer, Taiwan. For questions about this policy or to exercise your rights, email yang@chyang.tw.