Privacy Policy

What The Filter List stores, and where

Everything you add — your assets (Home, Auto, Work, and any categories you create), your filters and their replacement intervals, reminders and notification times, parts and their reference photos, on-hand quantities, SKUs, and replacement history — is saved locally on your device.

By default this information stays there: it isn't uploaded to any server and isn't visible to the developer. There are two times any of it leaves your device, and you start both of them: when you choose to create a backup yourself (see “Backups and exports”), and when you turn on Sync (see “Sync”).

Sync

Sync is optional. It is off unless you turn it on, and The Filter List works exactly the same without it. Everything in this section applies only if you choose to use it.

What Sync does. When you turn Sync on, The Filter List gives you a five-word code — something like zebra-harbor-canvas-anchor-about. Entering that same code on another device links the two, so changes on one appear on the other. There is no account, no email address, no password, and no sign-up.

What is stored on the server. A copy of your filter list: your assets, filters, devices, replacement dates and intervals, part numbers, reorder links, quantities, notes, reminder settings, and your reference photos.

What is not stored on the server. Your name, email address, phone number, location, contacts, or device identifiers. The Filter List does not ask for any of these and has nowhere to put them.

How your data is identified. Your five-word sync code never leaves your device. Your device converts it into a one-way code (a hash) and sends only that. The server converts it a second time before storing it, so the value kept on our server cannot be turned back into anything that would let someone reach your data. The practical effect is that your data on the server isn't connected to your name or to you personally — only to a code that you hold.

Where it is stored. On Cloudflare's infrastructure, in the United States. Cloudflare hosts the data on our behalf; it isn't shared with them for their own use, and it isn't shared with, sold to, or disclosed to anyone else.

How it is protected. Data is encrypted in transit (HTTPS) and encrypted at rest by Cloudflare. It is not end-to-end encrypted: as the operator of the service, the developer could in principle read what is stored. The developer does not do this, and there is no tooling or process to browse user data — but we would rather say so plainly than imply a protection that isn't there.

How long it is kept. For as long as Sync is turned on. You can delete it whenever you want — see “Deleting your synced data” below.

Turning Sync off. Settings → Sync → Stop Syncing disconnects that device and removes its sync code. Your filters stay on the device. The copy on the server is left alone, so your other devices carry on unaffected.

Deleting your synced data

From within the app. Settings → Sync → Delete Server Copy. This permanently erases your data and photos from the server and disconnects that device. The filters on your device are not touched.

If another of your devices is still syncing, it will upload its own copy again the next time it runs — so if you want the data gone for good, stop syncing on your other devices first.

If you no longer have the app installed. Email support@thefilterlist.app with the subject “Delete my data”.

Because The Filter List collects no names, email addresses, or account details, we can't look your data up from an email address alone. Include your five-word sync code, which you'll find under Settings → Sync → Show sync code on any device still using it. Without it there is genuinely no way to identify which data is yours.

If you have no sync code and no device with the app installed, we have no means of identifying your data. It contains no name, email address, or contact details of any kind, and it isn't linked to you.

What happens when you delete. All of your filter, device, and asset records, all of your reference photos, and the account itself are removed from active systems immediately.

Database backups are kept for up to 30 days as protection against data loss, and individual records can't be selectively removed from them. Deleted data in those backups is overwritten on the normal retention cycle. We'd rather tell you this than claim an instant and total erasure we can't deliver.

Notifications

The Filter List asks permission to send notifications so it can remind you before each filter is due. Reminder scheduling happens entirely on your device — notifications are generated on your device rather than sent from a server, and the developer never sees them.

Photos and camera

The Filter List asks permission to use your camera and photo library so you can add reference photos of replacement parts — a picture of the box, the part number, anything that helps you find the right one next time. Those photos are stored on your device as part of your catalog. If Sync is off, they stay there and are never uploaded. If you turn Sync on, your photos are included in what is synced, so they can appear on your other devices — see “Sync” above. They are never analyzed, used for training, or shared.

Backups and exports

The Filter List lets you create a backup of your data whenever you want. This is always optional and always started by you — The Filter List never backs up or exports your data automatically or in the background.

When you create a backup, everything in The Filter List — your assets, filters, reminders, parts, photos, history, and app settings — is gathered into a single backup file. Your sync code is not included in it. You decide what happens to that file: keep it on your device, save it to your own cloud storage (such as iCloud Drive or another service through the iOS share sheet), or move it to another device. Wherever you choose to put it, that destination belongs to you and is governed by that service's terms and privacy practices, not by The Filter List.

Because you create the backup and choose where it lives, the developer never sees it, receives it, or has access to it. To remove a backup, delete the file from wherever you saved it. Restoring simply reads that file back into The Filter List on your device, and never changes your Sync settings.

No accounts, no tracking, no analytics, no ads

The Filter List has no sign-up or login — not on your device, and not for Sync. It includes no third-party analytics or advertising tools, sets no tracking identifiers, and shows no ads. It doesn't track you across other apps or websites.

Your data is never sold, rented, or shared for advertising or for any other purpose.

Links to other sites

The Filter List may include links to outside websites, such as retailers or replacement-part listings. Some of these may be affiliate links, which means the developer could earn a small commission if you buy something after tapping one — at no extra cost to you. Tapping a link takes you to a third-party site that's governed by its own privacy policy, not this one.

This website

This page is part of a simple, static website. It doesn't use tracking cookies, doesn't run third-party analytics, and doesn't collect personal information from visitors.

Your control over your data

Everything The Filter List holds is yours to remove.

• Deleting a filter removes it from your device — and from your other devices, if Sync is on.
• Deleting the app removes everything stored on that device.
• Settings → Sync → Delete Server Copy removes everything from the server.

If you've never turned Sync on, there's nothing to request from the developer, because the developer never had your data in the first place.

Children's privacy

The Filter List isn't directed at children under 13 and doesn't knowingly collect personal information from anyone. The app asks for no personal information at any point — no name, email address, or account of any kind — so this holds true for users of every age.

Changes to this policy

If The Filter List's data practices ever change — for example, if a future version handles your information in a new way — this page will be updated and the “last updated” date above will change to reflect it.

Contact

Questions about privacy? Email support@thefilterlist.app.