Support center

Open the app and tap the crown in the top-right corner of the home screen (or go to Settings → My subscription). The available offer, its price and its terms are shown there before any purchase. Payment is processed through your Apple or Google account.

Barto, Blok's beaver, is the app's job site assistant. Ask your question from the home screen ("Talk to Barto"): he explains and opens the right calculation, already filled in. His answers come from an artificial intelligence service (OpenAI): he needs an internet connection and can make mistakes, so always double-check. Access conditions are shown in the app.

In the free version, each calculation uses one credit; running the same calculation again is free. Credits top up every week, up to a reserve limit. Tap the coin at the top of the home screen to see your balance and the date of the next top-up. With Blok Pro, calculations are unlimited.

Cancellation is done directly from your Apple or Google account. On iOS: Settings → [Your Name] → Subscriptions → Blok → Cancel. On Android: Google Play → Profile → Payments & subscriptions → Subscriptions → Blok → Cancel. A "Manage my subscription" shortcut is also available inside the app on the "My subscription" screen. Cancellation takes effect at the end of the current paid period.

Open Blok, go to "My subscription" → "Restore my purchases". Make sure you're signed in with the same Apple (or Google) account used when you made the original purchase. Your Pro access will be restored within seconds.

Go to Settings → Information → "Erase all my data". This irreversible action erases your projects, history, favorites, preferences and your conversation with Barto, and resets the audience measurement identifier. Alternatively, simply uninstall the app. Your Apple/Google purchases remain linked to your account and can always be restored. The same button also erases what our server and RevenueCat keep: your anonymous account, your feedback and reports, your subscription status and your purchase history. To confirm, the app asks you to type "CONFIRM".

Settings → Language. You can choose from French, English, Spanish, German, Italian, Portuguese, or leave it on "System" to follow your phone's language.

Formulas follow the standards of the country chosen in Settings → Country and standards (DTU and NF in France). That said, Blok is an estimation tool. For any calculation critical to the safety of a structure, always consult a qualified engineer or structural firm.

Yes, on both platforms: iPhone and Android.

No. Since version 2.0, Blok shows no ads and does not track you across apps: no more "Allow tracking" request or advertising consent form. Audience measurement without any advertising identifier and crash reports help us improve the app; you can turn them off at any time in Settings → Usage statistics.

Write to us at [email protected]. Field feedback directly shapes our roadmap — your suggestion will be read and considered.