Fasto — an intermittent fasting timer organised by metabolic phase
English Health notice. Fasto is an informational and educational tool: it is not a medical device and it does not diagnose, treat or prevent any disease. Always consult your doctor before starting any fasting routine, especially if you are pregnant or breastfeeding, if you have or have had an eating disorder, diabetes, kidney or liver problems, if you are under 18, or if you take medication that must be taken with food. Use of the app is the sole responsibility of the user. If you feel unwell, dizzy or weak, stop fasting and seek medical attention.
Español Aviso de salud. Fasto es una herramienta informativa y educativa: no es un dispositivo médico y no diagnostica, trata ni previene ninguna enfermedad. Consulta siempre a tu médico antes de empezar cualquier pauta de ayuno, especialmente si estás embarazada o en lactancia, si tienes o has tenido un trastorno de la conducta alimentaria, diabetes, problemas renales o hepáticos, si eres menor de edad o si tomas medicación que deba administrarse con alimento. El uso de la app es responsabilidad exclusiva del usuario. Si te encuentras mal, mareado o débil, interrumpe el ayuno y busca atención médica.
Français Avis de santé. Fasto est un outil informatif et pédagogique : ce n'est pas un dispositif médical et il ne diagnostique, ne traite ni ne prévient aucune maladie. Consultez toujours votre médecin avant de commencer un jeûne, en particulier si vous êtes enceinte ou allaitante, si vous avez ou avez eu un trouble du comportement alimentaire, un diabète, des problèmes rénaux ou hépatiques, si vous êtes mineur ou si vous prenez un traitement à administrer avec de la nourriture. L'utilisation de l'application relève de la seule responsabilité de l'utilisateur. Si vous vous sentez mal, étourdi ou faible, interrompez le jeûne et consultez un médecin.
Italiano Avviso sulla salute. Fasto è uno strumento informativo ed educativo: non è un dispositivo medico e non diagnostica, cura né previene alcuna malattia. Consulta sempre il tuo medico prima di iniziare qualsiasi digiuno, in particolare se sei in gravidanza o allatti, se hai o hai avuto un disturbo del comportamento alimentare, diabete, problemi renali o epatici, se sei minorenne o se assumi farmaci da prendere con il cibo. L'uso dell'app è responsabilità esclusiva dell'utente. Se ti senti male, hai capogiri o debolezza, interrompi il digiuno e rivolgiti a un medico.
Deutsch Gesundheitshinweis. Fasto ist ein Informations- und Lernwerkzeug: Es ist kein Medizinprodukt und diagnostiziert, behandelt oder verhütet keine Krankheit. Sprich immer mit deinem Arzt, bevor du mit dem Fasten beginnst, besonders wenn du schwanger bist oder stillst, wenn du eine Essstörung hast oder hattest, bei Diabetes, Nieren- oder Leberproblemen, wenn du minderjährig bist oder Medikamente einnimmst, die mit dem Essen eingenommen werden müssen. Die Nutzung der App liegt allein in der Verantwortung des Nutzers. Wenn dir unwohl, schwindelig oder schwach wird, brich das Fasten ab und suche ärztliche Hilfe.
Português (Brasil) Aviso de saúde. O Fasto é uma ferramenta informativa e educativa: não é um dispositivo médico e não diagnostica, trata nem previne nenhuma doença. Consulte sempre o seu médico antes de começar qualquer jejum, especialmente se estiver grávida ou amamentando, se tiver ou tiver tido um transtorno alimentar, diabetes, problemas renais ou hepáticos, se for menor de idade ou se tomar medicamentos que precisem ser tomados com alimento. O uso do app é de responsabilidade exclusiva do usuário. Se você se sentir mal, tonto ou fraco, interrompa o jejum e procure atendimento médico.
Write to rjm.softwaredevelopment@gmail.com with questions, bugs or suggestions. For a bug it helps a lot to include your iPhone model, your iOS version and what you were doing when it happened.
Fasto is a paid app with a single, one-off payment. There are no subscriptions, no in-app purchases and no premium tier: every feature and every future update is included in that one purchase.
No. Fasto works fully offline and there is no sign-up and no user account. The only thing that uses the network is iCloud sync, and that is optional.
On your iPhone. If you turn on iCloud sync, a copy also lives in your own iCloud so that your fasts appear on your iPad too — never on any server of ours. You can turn sync off in Settings, and doing so deletes that iCloud copy. See the privacy policy.
Yes. On the Now tab, tap Adjust hours and change the start time or the length of the plan.
If you are starting from scratch, 12:12. Add an hour or two per week until you find one you can keep up comfortably. Consistency matters more than extreme duration.
Yes. In Settings you can pick English, Spanish, French, Italian, German or Brazilian Portuguese, along with a light theme, a dark theme or the system one.
Each of the eight phases (0 to 72 hours) cites the published study it rests on, with a direct link to PubMed so you can read it yourself. You will find every reference together under About this information, at the foot of the Phases tab.
They remain educational, not a measurement: those studies describe groups of people, not you, and the exact moment each process happens varies a great deal from person to person.
Yes. On the History tab, the share button produces a readable PDF report with your period covered, your frequency, how often you met your goal and your longest fasts. There is also a CSV export for spreadsheets.
Uninstalling the app removes everything stored on the device. If you used iCloud sync, turn it off in Settings first: that deletes the iCloud copy as well.