Lenzy — Privacy Policy

Last updated: 7 October 2026

Lenzy is a contact lens replacement tracker. This policy explains exactly what the app does and does not do with information. It is written to be read, not to cover us — if something here is unclear, please ask.

The short version

• Your lens data never leaves your device. There is no Lenzy account and no Lenzy server.
• Lenzy shows non-personalized ads. We do not track you across apps or websites, and we do not ask for permission to do so.
• If you subscribe to Lenzy Pro, Apple processes the payment. We never see your payment details.

What stays on your device

Everything you enter into Lenzy is stored locally on your iPhone and is never transmitted to us:

• Your lens type and replacement schedule, and its brand and model if you choose to add them
• The dates you started each lens, and your change history
• How many lenses you have in stock
• Replacement dates for your lens case and solution bottle, if you track them
• Your prescription, if you choose to record it — power, base curve and diameter
• Your appearance, language and reminder preferences

Reminders are scheduled locally by iOS. No notification is sent from a server, and we cannot see whether you receive or open one. Deleting the app deletes this data permanently — we hold no copy and cannot restore it.

If you add the Lenzy home-screen widget, the countdown it displays is passed to it through a private storage area shared only between Lenzy and its own widget on your device. It is not transmitted anywhere.

From version 1.1, tilting your iPhone moves the water in the mirror on the main screen. For this Lenzy reads the phone's motion sensor while the app is open. The readings are used on the spot to draw the picture; they are not stored and are not transmitted anywhere.

Advertising

Lenzy is free and supported by ads from Google AdMob. Ads are requested as non-personalized only. That means:

• Lenzy does not use the iOS Advertising Identifier (IDFA) to track you.
• Lenzy does not show the App Tracking Transparency prompt, because it does not track.
• Ads are not targeted using your behaviour in other apps or on websites.

To deliver an ad at all, Google receives limited technical information such as your device type, coarse region, and IP address, and uses it for ad delivery, frequency capping and fraud prevention. Your lens data is never shared with Google or any advertiser. Google's handling of that information is covered by Google's Privacy Policy.

Subscribing to Lenzy Pro removes all ads.

Subscriptions

Lenzy Pro is an auto-renewing subscription sold through Apple. Payment is handled entirely by Apple and we never receive your card or billing details.

From version 1.1, Lenzy checks whether a subscription is active directly with Apple, on your device. No other company is involved in this check.

Version 1.0 used RevenueCat for the same check. In that version RevenueCat receives an anonymous, randomly generated identifier and your subscription status. It does not receive your name, email address, or any of your lens data. See RevenueCat's Privacy Policy.

What we do not do

• No accounts, logins or email addresses
• No analytics or crash-reporting SDKs
• No location tracking
• No access to your contacts, photos, camera, microphone or health data
• No selling or sharing of personal information

Health information

Some of what Lenzy stores is health information: your lens schedule, your accessory replacement dates, and — if you choose to enter it — your contact lens prescription. All of it stays on your device. None of it is uploaded, and none of it is shared with Google, RevenueCat, advertisers or anyone else.

Recording a prescription is entirely optional and Lenzy works fully without it. It is stored as a written note for your own reference when you reorder. Lenzy does not check, correct, interpret or suggest a prescription, and it does not compare one against any lens in the app. Lenzy does not read from or write to Apple Health.

Lenzy is a reminder tool and is not medical advice — always follow the guidance of your eye-care professional.

Children

Lenzy is not directed at children under 13 and we do not knowingly collect information from them.

Your choices

• Delete everything: delete the app. All local data goes with it.
• Remove ads: subscribe to Lenzy Pro.
• Manage or cancel a subscription: iOS Settings → your name → Subscriptions.

Changes

If this policy changes materially, the updated version will be posted here with a new date above.

Contact

Questions about this policy: lenzy.appp@gmail.com