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Vive-Eau

Low Tide Foraging Log

Vive-Eau is a tide booklet for la pêche à pied — gathering cockles, clams, razor clams and seaweed on the big tides of Finistère and the Côtes-d'Armor. If something isn't working as expected, or you have a question, this page is the place to reach us.

Frequently asked

Where do the tide times come from?

Vive-Eau has no live tide feed. You transcribe the high and low water times, and the coefficient, from your own paper annuaire des marées once a week using the booklet-style form on the Aujourd'hui screen. The app then draws the day's curve itself using the rule of twelfths.

Does the app tell me if a beach is open for foraging?

No. Prefectoral regulations and sanitary closures always take priority over anything in this app, and must be checked on the beach information panel or your prefecture's website. Vive-Eau never claims a beach is open or safe — this note is shown permanently in the Basket screen.

How does the réglette (ruler) calibration work?

Open the réglette's menu and choose Calibration. Hold a standard bank card (85.6 × 53.98 mm) against the screen and adjust until the drawn outline matches it exactly. From then on, the ruler is drawn at true scale so you can rest a shell on the glass and compare it with the minimum legal size.

Does Vive-Eau need an internet connection?

No. The entire app works offline — tides, spots, your catch log, the réglette and the season guide are all stored only on your device.

I found a bug, or a tide calculation looks wrong.

Please use the form below with as much detail as you can — the coefficient and times you entered are especially useful for us to reproduce a tide-curve issue.

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