Purchases

TidalPool is free to download with 3 days of full access. Starting that 3-day access window happens locally on your device and does not create a subscription or charge. After the 3 days, a single optional one-time purchase unlocks the whole app permanently — there is no subscription and nothing auto-renews or auto-charges. That purchase or restore action is handled entirely by Apple’s App Store (iOS) or Google Play (Android) through their own in-app purchase systems. TidalPool never sees or receives your name, payment card, or billing details. The developer receives only anonymous, aggregate sales figures from Apple and Google — never anything tied to you. Apple’s and Google’s handling of the transaction is governed by their own privacy policies.

Store access terms in every supported language · Updated July 15, 2026

TidalPool

Time the coast. Meet the residents. Leave no wake.

TidalPool is a privacy-first tidepooling companion with an offline species guide and fresh or cached government tide predictions — built around a look-don't-touch ethic.

Next predicted low tide + multi-day tide windows (NOAA + Canadian Hydrographic Service; internet required to refresh)
A field guide to tidepool species, with danger and first-aid notes for the few that bite or sting
A private journal of your finds — photos and notes stay on your device
United States & Canada · localized across 39 app and store locales

Start with 3 days of full access; afterward, an optional one-time purchase unlocks TidalPool permanently. No account, subscription, ads, analytics, or tracking. Journal content stays on your device; tide requests send only a public station ID and date range to the relevant government service. Predictions are for general planning only — not for navigation or safety-critical decisions. TidalPool is not affiliated with or endorsed by any agency.