ListKin Privacy Policy

This policy explains what information ListKin collects, why, and the choices you have. ListKin is made by EazyVerse Studio. If you have any questions, email us at hello@eazyverse.com.

The short version

ListKin is a shared shopping list, so the lists you create are stored in the cloud and shared with the people you invite. We collect usage and crash data so we can see what to improve and fix what breaks. If you use Sprout, ListKin's AI assistant, what you ask it is sent to AI services to get suggestions. We do not show ads, we do not use advertising networks, and we never sell your data.

Signing in

ListKin creates your account with Firebase Authentication. You can start without signing in, as a guest account that only has a random account ID, and sign in later to keep your lists across phones. You can sign in with Google, in which case we receive your name, email address, and profile photo from your Google account, or with an email address and password, in which case we receive your email address and the name you enter. We use these to identify your account, add you to households, and show who added or checked off an item.

What you create and share

To keep everyone's list in sync, we store the content you add:

• Shopping lists, items, quantities, and any prices you enter
• Receipts (slips) you save, including their totals and dates
• The households you belong to and their join codes
• Your display name, chosen currency, and language

Anything inside a household is visible to the other members you invite to it, so only share a join code with people you trust.

Where your data is stored

ListKin stores this data using Google Firebase (Cloud Firestore and Firebase Authentication), which acts as our backend on Google's infrastructure. A copy is also cached on your device so the app stays fast and works offline. Your data may be processed on servers located outside your country.

Analytics and crash reporting

ListKin uses two Google Firebase services to keep the app working well.

Firebase Analytics records how the app is used, such as which screens are opened and which features are used. Alongside this it collects device and app information, including your device model, operating system version, app version, language, a general region derived from your IP address, and a randomly generated app instance identifier. We use this to see which parts of the app people actually use, so we know what is worth improving.

Firebase Crashlytics records diagnostic information when the app crashes or misbehaves. This includes the stack trace, your device model and operating system version, and the state of the app at the time. We use this only to find and fix bugs.

Both services are linked to your account ID, so we can connect a crash report to a support request from you. We do not use them to build a profile of you or to identify you outside the app.

Neither service is used for advertising. The data is processed by Google acting as our service provider, and Google's handling of it is described in the Firebase privacy documentation.

Sprout, the AI assistant

Sprout suggests items for your list from what you tell it ("dinners for the week"). Using it is up to you; nothing is sent unless you open it and ask.

When you send Sprout a message, we send the following to our own server, and from there to an AI service to write the answer:

• your message and the last few messages of that conversation
• the names of the items on the list you are planning, and of the items you usually buy
• the language the app is in
• if you choose to add one, a photo (for example of your fridge or a handwritten list)

The AI services we use are Google Gemini, Groq, OpenRouter (and the model providers it routes to), Mistral, Cloudflare Workers AI, and OpenAI. We try them in turn, so any one message may go to any of them. Some of these services, on their free tiers, may use what they receive to improve their models, so please don't include personal details in your messages or photos.

Our server does not store your messages or photos, and does not write them to its logs. The one exception is an answer you report as wrong or inappropriate: then we keep that answer, the question you asked before it and the reason you picked, linked to your account ID, so we can review it. Nothing else from the conversation is sent with a report. It keeps a count of how many messages your account has sent today, to apply the daily allowance, and daily totals across all users (how many requests, and which service answered them). The conversation itself is saved only on your phone, for the list it belongs to.

ListKin Pro

ListKin Pro is an optional subscription sold through Google Play. Google handles the payment; we never see your card or payment details. To unlock Pro on your account we receive, from Google Play, the purchase token, which plan you bought, and when it renews or ends. We store that with your account ID so Pro follows you to a new phone. You can cancel at any time in Google Play.

Fair use and account safety

Requests from the app to our server carry a scrambled identifier for your phone: a one-way hash of the ID Android gives ListKin on that phone, from which the phone itself cannot be worked out. Our server keeps it with your account ID, together with the app version and the country and IP address the request came from.

We use this for two things. First, to count the free Sprout messages sent from a phone each day, so a new guest account on the same phone does not start a new allowance. Second, to tell real accounts from automated or duplicate ones, so we can remove those and keep the service working for everyone. It is not used for advertising, not shared with anyone, and it is deleted with your account.

Notifications

If you allow notifications, we use Firebase Cloud Messaging to let you know when a shared list changes. You can turn notifications off at any time in ListKin's settings or your device settings.

If News and offers is on in ListKin's settings (it is by default), your phone also joins a few notification groups so we can now and then tell you about new features and offers: everyone, free or Pro, and your app's language. No other data is used for it. Turning it off, or turning notifications off, leaves them, and shared list notifications are not affected.

What we do not do

• No advertising and no ad networks
• No selling or renting of your personal information
• No use of your usage or crash data for advertising, profiling, or resale
• No storing of your AI messages or photos on our server

Your choices

• Edit or delete items, lists, and receipts at any time in the app
• Leave a household to stop sharing with its members
• Ask us to delete your account and its data by emailing hello@eazyverse.com

Children

ListKin is intended for a general audience and is not directed at children under 13.

Changes to this policy

If we make material changes, we will update the date above and, where appropriate, let you know in the app.

Contact

Questions about your privacy or this policy? Email hello@eazyverse.com.

Need to remove your data? See Delete your ListKin account & data.