Privacy Policy

What we collect

Tunelight has no accounts, no ads and no tracking across other apps or websites, and we do not sell data. Your sound, your settings, your own tunings, your stickers and your keepsake cards stay on your iPhone or iPad. The app sends three things, each described below: a record of a Full Version purchase, feedback you choose to send, and anonymous usage statistics, which are on by default and can be turned off in Settings.

The microphone

Tunelight uses the microphone only to measure the pitch of the string you play. The sound is analyzed live on your iPhone or iPad and then discarded. It is never recorded, saved or uploaded, and nothing from the microphone — not the sound, not the notes or pitches it measures — is ever sent to anyone, not even in the usage statistics.

When you tap a note to hear it, the note is made on your iPhone or iPad and comes out of the speaker, or your headphones if they are connected. Nothing is recorded. If you are tuning, the microphone stays on, but while the note plays, and for a moment after, Tunelight ignores what it hears, so it never measures the note as your string.

What stays on your iPhone or iPad

Your settings — the instrument and tuning you chose, your recent tunings, the Shift setting, the A4 reference pitch and the display and pointer style — your own tunings in My Tunings (their names and notes), the stickers you’ve collected, and the record of your keepsake cards (the date and time, instrument and stickers of each card) are stored only on your iPhone or iPad, so the app opens the way you left it. We cannot see them.

Photos and sharing

When you tap Save to Photos on a keepsake card, Tunelight asks for add-only access to Photos. It can add the image you saved and nothing else: it never opens, reads or scans your photo library. The image stays in your own Photos library. When you tap Share, the image goes only to the app or person you choose, through iOS’s own share sheet.

Purchases

Full Version is bought through the App Store and handled entirely by Apple. We never receive your name, Apple Account or payment details.

When a purchase succeeds, Tunelight sends Apple’s signed record of it to AirPayment, AirBuild’s purchase-verification service, so we can confirm the sale. This also happens when Apple later delivers a transaction to the app, for example a purchase made on another of your devices, one approved through Family Sharing, or a refund. Restore Purchase creates no new record. The record says which product was bought and gives its transaction ID, date, price, currency and App Store country or region. It is sent with the Tunelight version, the iOS version and the device model. It contains nothing about your tuning, your stickers or your cards, and it is not used for advertising or tracking. Like any network connection, the server sees your network (IP) address; we don’t use it to identify you.

Unlocking does not depend on this record. If you are offline, Full Version still unlocks; the record may just not be sent.

Feedback

You can send us feedback from Settings. Nothing is sent until you tap Send. Feedback contains what you write, any screenshots you choose to attach (up to four), and the Tunelight version, the iOS version, the device model, and your language and region setting. It has no name, email, account or device identifier, and nothing about your tuning.

You choose screenshots in the system photo picker, so Tunelight sees only the ones you pick and asks for no access to your photo library. Each one is shrunk on your iPhone or iPad before it is sent.

Feedback goes to AirFeedback, AirBuild’s feedback service. We read it to fix problems and improve Tunelight; it is not used for advertising or tracking. Like any network connection, the server sees your network (IP) address; we don’t use it to identify you. Feedback carries no reply address, so if you would like an answer, email us instead.

Usage statistics

To see which features are used and where Tunelight needs work, the app sends anonymous usage statistics to AirTraffic, AirBuild’s analytics service. They record which screens you open and what you do: starting, finishing or leaving a tuning, with the instrument, the tuning, the number of strings and how many seconds it took; each string you get in tune; changing the display, the pointer style or the reference pitch; changing Shift, and the value you chose; tapping a note to hear it, which string it was and where you started it, but never the note or its pitch; creating a tuning with New Tuning, or editing, duplicating or deleting one in My Tunings, and how many strings it has, but never its name or notes; earning a sticker, and whether it was a rare one; opening a keepsake card; opening the Full Version page, where you opened it from and, if you tapped a locked built-in tuning, which tuning it was; whether a purchase or a restore went through, and when a purchase doesn’t, the reason (for example, you canceled, it is waiting for approval, purchases aren’t allowed, or there was a network problem) and the error code iOS gave; sending feedback, and how many screenshots it had; answering the microphone prompt; turning the statistics off; and when the app is installed, updated, opened or closed.

Each record also carries technical details: the Tunelight version, the iOS version, the device model, the screen size, your language and time zone setting, and whether you are on Wi-Fi or mobile data.

Usage statistics never contain sound, the notes or pitches Tunelight measures, or what you type in feedback. They are tied to a random number the app creates on your iPhone or iPad, not to your name, your Apple Account or any other account, and Tunelight does not use Apple’s advertising identifier. They are not used for advertising or to track you across other companies’ apps and websites. Like any network connection, the server sees your network (IP) address; we don’t use it to identify you.

Usage statistics are on by default. You can turn them off at any time in Settings → Privacy → Anonymous Usage Statistics. From then on Tunelight records nothing, and when the switch is off at launch it doesn’t start the statistics at all. A few records made just before you turned it off may still be sent.

Third parties

Purchase records go to AirPayment, feedback to AirFeedback and usage statistics to AirTraffic, all run by AirBuild, as described above. Usage statistics are sent with PostHog’s open-source library, set up to send only to AirTraffic. Apart from that, Tunelight shares data with no one, and it contains no advertising or tracking code. This website sets no cookies and loads nothing from other sites.

Keeping and deleting data

Your settings, your own tunings, stickers and keepsake cards live only on your iPhone or iPad: delete the app to remove them. You can delete your own tunings in the app at any time, even without Full Version. With Full Version you can also delete single cards in the app. Cards you saved to Photos stay there until you delete them in Photos.

Purchase records are kept in AirPayment as the record of the sale. Feedback is kept in AirFeedback for as long as we need it to act on it. Usage statistics are kept in AirTraffic, tied only to the app’s random number; deleting the app removes that number from your iPhone or iPad, and if you install Tunelight again, it starts with a new one.

Changing your mind

You can turn microphone access off at any time in the Settings app on your iPhone or iPad, under Tunelight → Microphone. Tunelight stops listening right away; turn it back on whenever you want to tune. Photos access can be changed the same way, under Tunelight → Photos. Usage statistics are switched off inside the app, under Settings → Privacy.

Changes and contact

If this policy changes, we will update this page and its effective date. Questions about privacy: cool_zqy@163.com.