Privacy Policy
Last updated: 19 October 2026
This policy covers this website (sumnerd.co.nz), the Tideline NZ app, the Fine Day app and the MousePhaser app. Short version: they collect very little. Your settings stay on your device or on your own network, and what does reach a server, and why, is set out below.
Plotstead has its own privacy policy at plotstead.co.nz/privacy, because it syncs between devices and so has more to explain.
This website
sumnerd.co.nz serves everything it needs from this domain: the fonts, icons, styles and scripts are hosted here, not pulled from a third-party CDN that could log your visit. There are no cookies, no analytics, and no ad trackers. Like any web server, the hosting provider may keep basic connection logs (IP address, request time and the address of the page asked for, which for a Fine Day card includes its suburb) as a normal part of serving pages; nobody reviews these for tracking purposes.
Your light or dark choice, and the place and daylight setting you pick in the Fine Day demo, are saved in your browser's own storage so the page remembers them. They stay in your browser, and clearing this site's data removes them.
Tideline NZ (the app)
There's no account, no sign-up, and no ads. Specifically:
- Location. If you use "locate nearest port", the map's locate button or Pin where I am, the app reads your device's location to work out which tide station is closest, to show where you are on the map, or to place a spot. Once one of these has worked, the map also shows where you are each time you open it. That happens entirely on your device; your location is never sent anywhere or logged, and it's kept only as the position of a spot you pin. If location is off or not allowed, the app says why and changes nothing.
- Your settings. Things like your launch threshold, pinned locations, and last-viewed port are saved only on your device (standard platform preferences storage), so the app remembers them between launches; on iPhone and iPad they're also in your iCloud or computer backup when that's on. Whichever theme you use, the app keeps the position of the spot or port you're viewing, rounded to about 1 km, so the Sunset theme can work out sunset there. None of this is sent to us.
- Your saved spots and their log. Spots you save (their positions, names, notes and fields) and each spot's log (catches, notes and photos) are stored only on your device. On Android your spots and log are included in your backup to your Google account when backup is on, without the photos, which go along only when you move to a new phone from one on Android 12 or later (otherwise Back up everything carries them); on iPhone and iPad, photos too, in your iCloud or computer backup when that's on. Either goes to your account, not ours; we never receive them. On Windows they stay on the PC, and uninstalling Tideline NZ removes them. They leave your device otherwise only when you export, back up or share a file yourself.
- Camera. Tideline uses the camera only when you take a photo for a spot's log or scan a spot's QR code, and asks first. A log photo is kept only on your device, with its location and camera details removed. Frames read for a QR code, on Windows from your PC's webcam, are looked at in memory to find the code; nothing is recorded, kept or sent.
- Spots by QR code. A spot's QR code holds the spot itself (its name, position, icon, colour and tide port, and its notes and fields only if you choose) and goes from your screen straight to the other device's camera: no internet, no link, nothing through us. The code isn't encrypted: another app's camera could read it, and might offer to search the web for its text, so scan it with Tideline.
- Notifications. Summaries, alerts and reminders are scheduled on your device; nothing is sent from a server. A spot alert names the spot, and your device's lock-screen settings decide whether that shows while it's locked.
- Tide data sync. The app periodically checks sumnerd.co.nz/tides/ for updated tide predictions: public data sourced from LINZ, not personal data. As with any web request, the server may log your IP address as part of normal operation. Sync only happens when you have a connection, and is throttled to once every 24 hours unless you tap "Sync Now" yourself.
- Sharing. The share button hands text to your device's own share sheet, and you choose where it goes. The app itself doesn't collect or see what you share it to.
- No analytics, no crash reporting. Nothing in the app phones home beyond the tide-data sync described above. On Android, the app uses Google Play services to hand the tide times for your selected and pinned ports to a paired Wear OS watch, for the Tideline watch tile. That's tide data only, nothing about you, and it goes from your phone to your watch through Google Play services, never to us.
Fine Day (the app)
Same philosophy as Tideline: no ads, no analytics, and the app needs no account.
- Forecasts in the app. When you pick or search for a place, the app asks Open-Meteo (open-meteo.com) for its forecast, straight from your phone. It sends the place's centre point, and like any web request Open-Meteo sees your IP address. None of it is tied to an identity, profile or advertising ID.
- Location in the app. If you tap Use my location, the app works out the nearest suburb on your phone and doesn't send your location anywhere.
- Your settings. Saved locations and preferences stay on your device.
- On this website. The live demo, the dashboard card and the card maker ask sumnerd.co.nz for places and forecasts, and sumnerd.co.nz asks Open-Meteo. The place asked about is used only for that.
- The card maker. If you tap Use my location on the Fine Day card page, your browser's location is rounded to about 1 km and sent to sumnerd.co.nz only to find the nearest suburbs. The rounded location isn't kept. The suburb you end up with is part of the card's web address, so like any page address it can show up in the host's ordinary logs.
- Fine Day for Home Assistant. The integration sends its key and the place you picked (a suburb's centre point, never your address) to the Fine Day server, fineday-api.sumnerd.co.nz, which is reached through Cloudflare. Your home location only goes out if you choose Use my home location, rounded to about 1 km, to find the nearest suburb. The server's request log notes which part of the service was asked for and when, but not who asked or the place. To keep a key to one household, the server notes the internet addresses each key is used from that day, against the name the key was issued to, and deletes that list the next day. The integration's dashboard card is this website's dashboard card for the same place, so it asks sumnerd.co.nz as above, and doesn't pass on your Home Assistant's address.
MousePhaser (the app)
No account, no ads, no analytics, and nothing leaves your own network.
- Your network. MousePhaser connects only to the other computers you pair it with on your local network. It sends pointer movement, clicks and wheel events between them, and nothing else. It does not read or send keyboard input. Nothing is sent to SumnerD or to anyone else on the internet.
- Finding each other. To find the host, the app sends a short query over your local network and the host answers with its computer name and port. That exchange stays on your network.
- Pairing. The passphrase you set is used to check that the other computer knows it too. It is not sent in the clear, and it is stored only on your own computers.
- Settings and logs. Your settings, computer names and arrangement are stored on your computer. If the app hits an error it writes a local log file, which you can send to support@sumnerd.co.nz if you choose. It is never sent automatically.
- The Microsoft Store. Buying and installing it goes through the Store under Microsoft's privacy terms. SumnerD sees nothing from that beyond Microsoft's sales reporting.
Tide data attribution
Tide data © Land Information New Zealand (LINZ), licensed under CC BY 4.0. The predictions are not official tide tables; see the app's Settings page for the full disclaimer.
If something goes wrong
If we ever have a privacy breach likely to cause serious harm, we will tell the people affected and the Office of the Privacy Commissioner, as the Privacy Act 2020 requires.
Your rights
You can ask for a copy of your information, or ask us to correct it. We'll come back to you within 20 working days, which is what the Privacy Act allows. If you think we've mishandled your information, write to us at:
If you're not happy with how we deal with it, you can complain to the Office of the Privacy Commissioner at privacy.org.nz.
Changes to this policy
If anything material changes, say an app starts collecting something it didn't before, or we add analytics, this page gets updated and the "last updated" date at the top changes with it.