Privacy

Last updated October 16, 2026. This page describes what the app does today. If the app changes, this page changes with it.

What is saved on your device

• Your log: catches (species, size, weight, lure, technique, kept or released, water temperature, notes, time, and GPS coordinates if you allowed location), trips (start and end, notes, a weather snapshot, coordinates), and spots (name, type, notes, coordinates). Stored in your browser’s local storage.
• Your photos: stored in your browser’s database.
• Preferences: units, whether weather is on, your fishing region, your species and lure lists, light or dark mode, and whether you have seen the intro and notices.
• Backup folder (optional): if you choose a backup folder in Chrome or Edge, your browser remembers permission to save into it, in its own database on this device. The app can see the folder’s name, not its full path, and only writes the backup files you ask for.
• Saved copies for offline use: the app’s own files, the map code after you first open the map, and map tiles you have viewed.

The app sets no cookies. This data is not encrypted, so anyone who can open your browser profile on this device can see it. Do not enter passwords, Social Security numbers, card numbers or other highly sensitive information.

What leaves your device

Only the items below, and only when you use that feature. Each service also sees your IP address and basic browser details, as any website does. I do not receive any of this.

These services have their own privacy practices: Open-Meteo, OpenFreeMap, Photon, Google.

Optional sync

If you sign in with a free mcbflow.com account (Sign in in the top bar, Data → Sync across devices, or Settings → Account & sync), your catches, trips, spots, notes, their coordinates and weather snapshots, the running trip, and your units, weather setting, region, species and lure lists are copied to your account so your other devices match. Photos are not synced: they stay on the device that took them, and other devices show “Not on this device”. Use Back up everything (ZIP) to move photos. Your current lure, last species and spot, theme and backup details stay on each device. The account database is run by Supabase (servers in the eastern United States); only your account can read your records. Your sign-in is kept in this browser so you stay signed in; turn off “Keep me signed in on this device” (Settings → Account & sync, or when you sign in) and it lasts only until the browser closes. Signing out stops syncing and keeps the data on this device. You can export or delete your synced data, or delete your account, on the mcbflow.com account page. More detail is in the mcbflow.com privacy policy.

Location

The app asks your browser for your location only when you do something that needs it: tapping Allow location, Use my location or the locate button, logging a fish, starting a trip, or opening an empty map. While a trip is running, it also refreshes your position every few minutes so new catches get the right place. Your browser asks you first, and you can say no. If you allow it, the exact coordinates are saved with that catch or trip on your device, and copied to your account only if you sign in to sync. You can always search for a place or paste coordinates instead.

Photos

Photos stay on your device. When you add one, the app resizes it (longest side 1,920 pixels) and saves a new copy. That drops the extra data a camera embeds, including GPS tags. If a photo can’t be processed, it is saved unchanged.

Your controls

• Export: Data → Export All (ZIP) for everything with photos and a spreadsheet, or JSON, CSV, Photos (ZIP) and Spots (GPX).
• Import: Data → Import Backup (JSON or ZIP) or Import Spots (GPX).
• Delete: Data → Clear all data (also in Settings → Backup & data). It erases your log, photos, preferences and the saved map tiles on this device. If you are signed in to sync, it deletes your synced Fishing data too. Clearing this site’s data in your browser does the same.

Backup files are not encrypted and contain exact spot locations and your notes. Keep them private, especially if you guard your fishing spots.

If you don’t sign in, I do not receive your data, so there is nothing on a server for me to look up, correct or delete. If you do, you can export or delete your synced data yourself on the account page.

Children

The app is a general-purpose fishing log and is not designed for children. Accounts are optional and only ask for an email and password. I do not knowingly collect personal information from anyone, including children. Outside services still see an IP address when a feature contacts them, as any website would.

Changes

The date at the top shows when this page last changed.

Credits

• Map data © OpenStreetMap contributors (ODbL). Map tiles by OpenFreeMap, using OpenMapTiles data.
• Place search by Photon, using OpenStreetMap data.
• Weather data by Open-Meteo.com, licensed CC BY 4.0.
• Map display: Leaflet (BSD-2-Clause), MapLibre GL JS (BSD-3-Clause) and maplibre-gl-leaflet (ISC). Their license texts are in vendor/LICENSES.txt.
• Icons in the app are emoji drawn by your device’s own font. The moon phase, sunrise and sunset are calculated on your device.
• Tide times: worked out on your device from harmonic data in the open Neaps tide database (MIT) and the Neaps tide predictor (MIT). Station data comes from NOAA CO-OPS (US government, public domain), the Norwegian Mapping Authority (Kartverket, CC BY 4.0), the Canadian Hydrographic Service, and TICON-4 (Hart-Davis, M., Dettmering, D., Seitz, F., 2025, doi:10.17882/109129, CC BY 4.0, modified). Predictions are estimates and are not for navigation.
• Species guide: tips are summarized in our own words from the sources listed on each species page (mainly Take Me Fishing, state and federal wildlife agencies, universities, and bird guides such as Cornell’s All About Birds and Audubon). They are not affiliated with or endorsing this app. Fish and wildlife drawings are original illustrations made for this app.