Where does the weather and tide data come from?

From a weather API called at save time with the catch coordinates — Open-Meteo returns temperature, wind, and pressure at no cost, and tide data is available from marine endpoints for coastal points. Store the values on the catch record rather than fetching them again later, since historical lookups cost money and a saved snapshot is what you actually want to compare against.

How do I keep spots private?

Make private the default and never build a public feed in version one. Spot coordinates are the single most sensitive thing in a fishing app and the fastest way to lose a user base, so any sharing should be per-spot, opt-in, and reversible — and consider offering a blurred-radius share that conveys a general area without the exact pin.

How to Build a Fishing Log App with AI (2026)

What a fishing log app needs

Log a catch with species, length, weight, and photo
Map pins for spots, private by default
Automatic weather, moon phase, and tide context
Gear and bait that produced each catch
Personal bests and season summaries

The screens

Screen	What it does
Log Catch	Species picker, measurements, photo, and one-tap save
Map	Your spots as pins, with catch counts per spot
Spot Detail	Every catch at this spot, best conditions, best baits
Trips	A trip groups a day of catches with hours fished and conditions
Stats	Personal bests by species, catch rate by month and time of day

The data model

Trip: date, waterBody, hoursFished, weatherSummary, notes
Catch: tripId, spotId, species, lengthCm, weightKg, baitId, photoUri, releasedAt, caughtAt
Spot: name, latitude, longitude, isPrivate, notes
Bait: name, type (lure | fly | live), colour
Conditions: tripId, airTempC, waterTempC, windKph, pressureHpa, moonPhase, tideState

The build prompt (copy this)

Paste this into ShipNative and it becomes a working React Native app with these screens, navigable in a live preview, in about two minutes:

“A fishing log app. Logging a catch is the primary action and must work with no signal: species picker, length and weight, an optional photo, and the bait used, saved locally in two taps and synced when connectivity returns. Each catch is attached to a spot, which is a map pin the user drops, and spots are private by default with a clear toggle rather than a social feed. When a catch is saved, capture the conditions automatically from the device and a weather service — air and water temperature, wind, pressure, moon phase, and tide state — because the whole value of a log is being able to ask later which conditions produced fish. Catches group into trips by day, and the trip screen shows hours fished and catch rate. The stats screen shows personal bests per species and a breakdown of catch rate by month, time of day, and bait. Screens: Log Catch, Map, Spot Detail, Trips, Stats. Everything works offline and photos upload in the background.”

Then iterate with small, screen-specific prompts (“make the primary button bigger”, “add an empty state”), preview on your own phone, and export the full Expo project whenever you want. The full method: how to build an app with AI.

How it makes money

A one-time unlock ($5-10) for unlimited spots and photo backup fits better than a subscription — anglers log seasonally, and a monthly charge for an app used twenty days a year churns hard. The honest ceiling is that free general-purpose note apps do 60% of this, so the paid tier has to be the conditions data and the stats, not the logging itself.

Implementation and the revenue math for every model: how to make money from an app. When you’re ready to ship: App Store and Google Play publishing guides.

Build it now

The prompt above is free to run at shipnative.dev — working fishing log app on your phone today, full code export, no credit card.

How to Build a Fishing Log App with AI