CosCheck - Privacy Policy

Last updated: November 2026

This policy explains what CosCheck collects, why, and how you can see, export, or delete it. It is written to match what the app actually does.

1. Who we are

CosCheck is developed and operated by Angeroku, an individual developer based in Latvia. In this policy, "we" and "us" mean Angeroku.

Contact: [email protected]

2. Data we collect

Account. You can use CosCheck anonymously; then we only store an identifier generated for your device. If you register, we store your email address and password.

Profile. Your nickname and avatar image, if you set them, and whether your account has CosCheck Pro. Optionally: your home country (used to compare plugs and voltage when you travel), and your cat companion's name and colour.

Costume and planning data. Everything you add to your costumes: checklists, emergency-kit items, notes, photos, drawings and text in Creative mode, budget and expenses, craft time logs, prop dimensions, and event dates. If you plan a trip: transport, carrier, departure times, the event's country, and any trip notes you write (for example a flight number), plus your packing: bags, item weights and fragile items.

Photo links. Costume photos and group photos are stored at web links that cannot be guessed, but are not password-protected: anyone who is given a link can open that photo.

Voice recordings. Only when you tap the microphone: voice notes in your costume checklists, voice tasks in a group, and voice messages in a group chat. Recordings are stored in private cloud storage and played through short-lived links. A voice note in your costume checklist is also kept on your phone; its cloud copy is visible only to you. Voice tasks and voice messages are visible to the members of that group. We do not convert recordings to text and do not use them for anything else.

Body measurements. Optional. Stored only if you enter them, and visible to your Co-op Groups only if you turn on sharing.

Accessibility settings stay on your device. The wheelchair / mobility-aid travel mode and the colour-vision mode are stored only on your device and are never uploaded, because they can reveal information about your health. If you switch phones, turn them on again there.

Groups and checklists. Which Co-op Groups and Global Checklists you belong to, your role, and what you add there: tasks and which ones you marked done, comments, reactions, and your character badge.

• If you link one of your costumes to a group, its checklist and progress become visible to that group's members.
• Photos you share in a group's Photos section are visible to all its members. You or the group's captain can delete them.
• Your canvas in a group (Creative mode) is visible to all its members; only you can change it. It is deleted when you leave the group.
• The group board (Creative mode) is shared: every member can see, move and delete what anyone draws or writes on it. What you add stays on the board if you leave the group, and is deleted when you delete your account.
• Handwriting to text in Creative mode is processed on your device by Google ML Kit; your drawings are not sent anywhere for this.
• Group Notes are visible to all members; by default only the captain can edit them.
• Polls in a group are visible to all members. In a poll that is not anonymous, members can see who voted for what; in an anonymous poll only the totals are shown, and only you can see your own vote.
• If the captain turns on Travel for a group, the group's route and which members travel separately are visible to the group. Your own trip (transport, times and trip notes) is shared with a group only if you turn on "Share this trip with my groups" in that costume.
• With CosCheck Pro in a group, members can see who travels on the same flight and the bag weights of linked costumes. Names and spare-kg amounts are shown only when every member agrees, or when a captain with Pro turns this on for the group.
• If you send an SOS alert in a group, we store it with the optional message you write, so the group can see it.
• Group chat messages are stored only briefly: 3 minutes after everyone has left the chat, all but the last 10 messages are deleted automatically, and those 10 are replaced as new messages arrive. Voice messages are deleted together with their message; the audio file is removed from storage the next time someone in the group opens the chat. A reply stores a short quote (up to 200 characters) of the message it answers, so the quote stays visible even after the original message is deleted; it is deleted together with the reply. If you report a chat message, its text is kept with your report (for a voice message, only the fact that it was a voice message).
• Cats appear in a group only when its captain has Pro, so members can tell whether the captain has Pro.
• If you block someone, we store that you blocked them, so their content stays hidden for you on all your devices. They are not notified, and only you can see your list of blocked users.

Global Checklists. Global Checklists are public to registered users: anyone registered can find a list by its title and see its items, comments and the author's nickname.

Reports you send. If you report a group member, a chat message or a Global Checklist, we store the report and the reason you give.

Purchases and tips. The product you bought, its dates, and the store's transaction reference. Payment itself goes through Google Play or the App Store; we never see your card details.

• When you leave a tip in the app, you can add a name and a short message. They are optional, stored with that tip, and visible only to the developer, never to other users.
• On Windows, tips go through Ko-fi, an external website. Ko-fi may share your name, email and message with us, as described in Ko-fi's privacy policy.

Presence. An approximate "last seen" time, updated while the app is open, so group members can see who is around.

Crash reports. See section 4.

Data that stays on your device. Your unlocked achievements, appearance settings, accessibility settings, and on/off settings such as the cat companion are stored only on your device and are not uploaded. Some achievements are worked out from data you already have; for example, "Founding Member" checks your account's sign-up order. That order is not shown to anyone.

No advertising, no tracking. CosCheck has no advertising or analytics/tracking SDK. The only sensor it reads is the accelerometer, used for a decorative background effect; that reading never leaves your device.

3. How we use your data

• To run the app: syncing your costumes and checklists across your devices, group features, SOS alerts, and the reminders and alarms you set.
• To process Pro subscriptions and tips, and to unlock Pro features on your account.
• To keep shared spaces safe: enforcing the Community Rules and reviewing reports.
• To find and fix crashes and bugs, and to look into problems you report.
• To answer you when you contact us.

We do not sell your data and do not use it for advertising.

Legal bases (GDPR): we process your data to provide the service you asked for (performance of a contract); to keep CosCheck secure, moderate shared spaces and fix crashes (our legitimate interests); where the law requires us to keep records, such as purchase records for tax purposes (legal obligation); and, for optional features such as sharing your measurements or your trip with your groups, or showing your name and spare kg to your group, based on your choice (consent), which you can withdraw at any time.

4. Crash reports

CosCheck uses Sentry, a third-party error-monitoring service, to learn about crashes and bugs. A crash report contains technical details only: what failed, a stack trace, basic device and app information (device model, operating system and app version), and a random installation ID that lets us see how stable the app is. It is not linked to your name or email. It does not include your costumes, checklists, notes, photos, email, nickname, or other content you entered.

Crash reports are sent only from registered accounts; if you use CosCheck anonymously, none are sent. If you object to crash reports from your account, contact us (see section 11) and we will stop them.

5. Who processes your data

We use these service providers. They process data only to provide their service to us:

• Supabase - database and file storage (region: EU West, Ireland).
• Sentry - crash reports (see section 4).
• RevenueCat - manages subscriptions and tips. It receives your CosCheck account ID and purchase history, not your costumes or other content. RevenueCat is based in the United States.

Google Play and the App Store process payments under their own privacy policies. On Windows, Ko-fi processes tips under its own privacy policy.

A copy of your data is also cached on your device, so CosCheck keeps working offline. This includes the last loaded version of your Co-op Groups and Global Checklists, so you can still read them without a connection; it is removed from the device when you delete your account.

To tell "no internet" apart from "the CosCheck server isn't responding", the app sometimes sends an empty request to a Google connectivity-check address (www.gstatic.com/generate_204, the same one Android itself uses). It happens only when our server does not answer. No account details or content are sent; like any web request, it reveals your IP address to Google.

6. Transfers outside the EU

Where a provider processes data outside the European Economic Area (for example, RevenueCat in the United States), the transfer relies on safeguards required by the GDPR, such as the European Commission's Standard Contractual Clauses.

7. How long we keep data

• Your account data is kept while your account exists.
• When you delete your account, it is permanently deleted after a 3-day grace period, together with related data, including what you added to groups. Your profile picture and the photo files in our cloud storage (costume photos and photos you shared in groups) and your costume voice notes are deleted right away when you request deletion; if you restore the account, costume photos still saved on your phone are uploaded again.
• If you leave a group, the tasks you created there stay visible to the group until its captain removes them or you delete your account.
• When you delete your account, your poll votes are deleted; polls you created stay in the group without your name until the captain deletes them.
• Our records of purchases and tips (product, price, date, transaction reference, and any name or message added to a tip) are kept as long as tax and accounting laws require, and are no longer linked to your account after it is deleted.
• Purchase records kept by Google Play, the App Store and RevenueCat follow their own retention rules and the record-keeping periods required by law.

8. Your rights

• Export: Account → Settings → Download my data gives you a file with your profile (including home country and cat), costumes with trips, packing and photo links, measurements, group and checklist memberships, and links to photos you shared in groups. Data that stays on your device (achievements, preferences) is not part of the export; uninstalling the app or clearing its data removes it.
• Deletion: Account → Settings → Delete account. Your account is marked for deletion and you are signed out. If you sign back in within 3 days, you can restore it; after that it is deleted permanently. Without the app, email us from your account's email address and we will delete it within 30 days.
• Subscriptions: deleting your account does not cancel a Pro subscription. Cancel it in your Google Play or App Store subscription settings.
• Other rights: depending on where you live, you can also ask us to correct your data, or to restrict, object to, or port its processing. Contact us at [email protected].

You also have the right to lodge a complaint with a data protection authority. In Latvia, this is the Data State Inspectorate (Datu valsts inspekcija).

9. Children

CosCheck is not intended for children under 13 (or the minimum age that applies where you live), and we do not knowingly collect data from them.

10. Changes to this policy

We may update this policy as the app changes. The date at the top shows the latest version. Important changes will be announced in the app.

11. Contact

Questions about your data: [email protected]