Privacy Policy

Last updated October 3, 2026

Daystack is a video editing app for iPhone made by Burak Sakalli. It works entirely on your device. This policy explains what happens to your information when you use it.

Information we collect

No personal data. Daystack has no accounts and no advertising, and it never tracks you. Up to version 2.1 the app sends nothing at all. From version 2.2 it sends a few anonymous usage events to our own server, described below, so we can see which features people use. Nothing is shared with anyone else.

Anonymous usage statistics (version 2.2 and later)

Daystack sends these events, and nothing else, to apps.buraksakalli.org:

• open: at most once a day, saying whether it’s the first open of the week and of the month.
• export: when you finish exporting a video, with its resolution, its frame rate and whether you have Daystack Pro.
• paywall: when the Daystack Pro screen opens, with what opened it, for example the 4K option.
• purchase started: when you tap to buy Pro, with the plan (yearly, monthly or lifetime) and what opened the screen.

Each event also carries the app’s version, the platform (iOS) and whether it comes from a test build. No identifier of any kind is sent: no user, account, device, install or advertising ID. So events can’t be linked to you or to each other. The server stores no IP addresses and keeps no request logs. It’s our own server, hosted by Hetzner in Finland.

Your photos and videos

• You choose media with Apple’s photo picker. Daystack only receives the items you pick and never reads the rest of your library.
• Picked items are copied into Daystack’s own storage on your iPhone so your projects keep working later.
• When you save a finished video, Daystack asks for permission to add it to your photo library. This permission only allows adding, not reading.

Storage and deletion

Your projects stay on your device. Deleting a project removes Daystack’s copies of its media, and deleting the app removes all of its data. If you use iCloud Backup or another device backup, Daystack’s data may be included in that backup under your own settings.

Sharing

Daystack only shares a video when you choose to, using the standard iOS share sheet. Where it goes is up to you.

Purchases

Daystack Pro is sold through the App Store. Apple processes the payment, so Daystack never receives your payment details or your Apple Account information. The app checks on your iPhone, using Apple’s StoreKit, whether Pro is unlocked. Nothing about your purchase is sent to us.

Settings kept on your iPhone

Daystack remembers a few things on your device, such as your watermark corner, whether you’ve seen the welcome screens, and how many videos you’ve exported. The count is only used to decide when to ask for a rating or mention Pro. None of it leaves your iPhone.

Children

Daystack does not collect information from anyone, including children.

Changes to this policy

If this policy changes, the new version will be posted on this page with an updated date.

Questions about privacy? Email burak@buraksakalli.org.