About OpenSolids

What this is

OpenSolids is a free, open guide for starting a baby on solid foods. The research behind safe solids introduction — when to start, how to cut food safely, how and when to introduce allergens — is public and freely available. This app organizes it into something practical: an exact safe texture for every food at every age, a daily plan that adapts to your logs, and clear playbooks for allergic reactions.

It is educational guidance, not medical advice. Your pediatrician knows your baby; when the app and your clinician disagree, the clinician wins, every time.

Methodology

• Every one of the 157 food entries and each engine rule cites at least one source from the list below. A CI check fails the build if a claim ships without a citation, if a choking-risk food lacks a mitigation, or if a texture spec is vague.
• All text is written from primary, freely available sources — never copied from commercial products. Illustrations are our own original diagrams.
• Allergen scheduling follows the NIAID 2017 addendum guidelines and the LEAP/EAT evidence: early introduction, one new allergen at a time, risk-stratified peanut guidance, and consistent maintenance once tolerated.
• Links are re-verified weekly by an automated check, and each citation records the date it was retrieved.

Privacy

Everything you enter — your baby's profile and every log — lives in your browser's storage on your device. An account is optional and only syncs that same data to your other devices. There are no ads, no cookies for analytics, and no individual tracking: the server counts page loads in aggregate only (which page, on which day — never who). The Export button gives you a complete JSON copy of your data; "Delete all data" on the History page removes everything instantly. If you clear your browser data, your logs go with it, so export a backup now and then.

Getting in touch

Questions about the app, a food entry that looks wrong, a confusing screen, or a bug — email [email protected] and a person will read it. Replies can take a few days.

Email is slow. For a reaction happening right now, open the emergency guide or call your local emergency number. For medical questions about your baby, your pediatrician comes first. Emergency guide

Name & trademarks

"OpenSolids" is a working name. This project is not affiliated with, endorsed by, or connected to any commercial infant-feeding program or brand.