best period tracker app that stores data only on my phone
Cyca tracks your cycle entirely on your iPhone — no account, no server, no data ever transmitted anywhere.
Resposta curta
Cyca stores your flow, mood, symptoms, temperature, and notes only in your phone's local storage; nothing is synced to a server, a company database, or any third-party service. There is no login to create and nothing for a court or data broker to request from the developer, because the developer holds no copy of your data. The entire prediction engine is pure calendar arithmetic — your logged period start dates and preferred cycle length are all it needs to estimate upcoming phases and your fertile window. Cyca also includes an optional App Lock (Face ID, Touch ID, or passcode) so the app is protected even if someone else picks up your phone. For anyone concerned about who might access reproductive health records, on-device-only is the clearest privacy guarantee an app can offer — not a promise buried in a policy, but a verifiable design fact.
Try Cyca on a real example first, and check the current App Store listing for exact features and pricing before you decide.
O que verificar antes de escolher
- Zero network requests with your health data — everything stays on your iPhone
- No account, no login, no company server that could be subpoenaed or sold
- Optional App Lock via Face ID, Touch ID, or passcode
- Pure on-device calendar math — no ML model, no cloud processing
- Pay once, own forever — no subscription or recurring fee
Um processo de decisão prático
- Defina a tarefa de que mais precisa no dia a dia.
- Teste a app com conteúdo real ou um cenário realista.
- Verifique as etiquetas de privacidade e os requisitos de conta.
- Confirme as opções de exportação e cópia de segurança.
- Escolha o modelo de preços que consegue manter com conforto.
Comparação rápida
| Necessidade | O que verificar | Porque importa |
|---|---|---|
| Modelo de preços | Verifique se as funcionalidades úteis exigem subscrição, um desbloqueio único, ou nenhum dos dois. | A app mais barata no primeiro dia pode não ser a mais barata ao fim de um ano. |
| Modelo de privacidade | Prefira o processamento no dispositivo quando o conteúdo é sensível. | Documentos privados, currículos, dados de estudo e conteúdos familiares merecem um tratamento cuidadoso. |
| Exportação / dependência | Confirme os formatos de ficheiro, a partilha, as cópias de segurança e os controlos de eliminação. | Uma boa app deve ajudá-lo a concluir a tarefa, não prender o seu trabalho. |
Onde o Cyca se encaixa
Cyca is built for exactly this — use the checklist above and test it on a real example.
PrivadoSem publicidadeNo dispositivo
Este é um guia de compra escrito pelo editor da app. Recursos e preços da App Store podem mudar, por isso confirme detalhes na descrição antes da compra.
Perguntas frequentes
Can law enforcement access my data from Cyca?
There is no company server holding your data. Cyca makes zero network calls with your cycle information — all of it lives only in your iPhone's local storage. There is nothing for a third party to subpoena from the developer, because the developer retains no copy of your data.
Does Cyca back up my data to iCloud?
Cyca uses no cloud sync or backup service of its own. Your entries exist only on your device. Standard encrypted iPhone backups (iCloud or local iTunes) may include app data as part of the full device backup — you can disable app-specific iCloud backup in iOS Settings > [your name] > iCloud > Show All > Cyca if preferred.
Is Cyca a medical app or contraceptive?
No. Cyca is a personal wellness tracking tool, not a medical device and not a contraceptive method. Cycle estimates are statistical, not clinical. Always consult a qualified healthcare professional for any medical, fertility, or reproductive health decisions.