Protein first. A calmer daily journal.

Guardrail's real Today screen: protein logged against a user-selected target, with calories secondary.
Guardrail's Today screen showing the protein meniscus filling toward the selected target

Choose your own protein target, understand today in one glance, and log food manually, by barcode, or with an optional photo estimate you review before saving.

Manual logging stays available without a camera, subscription, or AI scan.

Your target. Editable and never presented as a prescription.
Your review. No machine estimate silently enters the journal.
Your local journal. Clear it in-app whenever you choose.

Today without dashboard clutter.

The protein meniscus keeps the amount logged, amount remaining, selected target, and recent rhythm in one composed view. Calories stay secondary instead of taking over the day.

One glance first. Detail only when you ask for it.

Guardrail's real journal: food entries with their source visible — manual, barcode, or reviewed photo estimate

A scan never writes on its own.

Guardrail can estimate a visible portion from a food photo, but confidence changes the explanation, not your control. Every result stays editable and waits for an explicit save.

AI can be wrong. Manual logging always remains available.

PhotoChosen only after the first-use disclosure.
EstimateProtein, calories, portion, and confidence.
ReviewEdit, retry, or switch to manual entry.
Nothing added yetYou choose Save

A journal that stays understandable.

Food entries keep their source visible. Optional dose-day and wellbeing check-ins remain on the device, and pattern language reflects only what you logged. Guardrail does not diagnose or prescribe.

Read the complete privacy boundary

JournalFood and wellbeing entriesOn device
PhotoOnly when you choose ScanReviewable
PurchaseGoogle Play and RevenueCatStore managed

Join the Android beta waitlist.

Guardrail is being prepared for Google Play internal testing. Request access and we will contact selected testers when the track opens. No clinical outcomes or medical claims are promised.

Annual ProLocalized Play price
Monthly ProLocalized Play price

Google Play shows the exact price, billing period, renewal terms, and taxes before purchase.