ナイショ：オフラインAI秘書・日記・健康

Naisho is an "offline AI app" that performs all processing within your device. The information you enter is never sent to external servers. No account registration is required, and there are no ads.

On the home screen, you can choose from three tools: "Secretary," "Diary," and "Health Notebook." Since all three share the same AI model, you only need to download the model once.

■ Secretary (Supports work and personal writing)
- Create email replies (select writing style from polite/standard/casual/concise)
- Summarize long texts, proofread and revise texts
- Translation (Japanese ⇔ English, Chinese, Korean)
- Create meeting minutes (summarize from speech logs, decisions, and to-dos)
- Long texts are automatically split and processed, so meeting minutes and documents can be pasted directly.
- Read paper documents and whiteboards with the camera and use them directly for replies, summaries, meeting minutes, and translations (reading is completed within the device).
- Supports voice input (using the device's standard voice recognition app) and pasting from other apps.
- Specify "length (short/standard/long)" and "additional instructions" before execution.
- Copy/send via email/save as a template with one tap once the created text.
- Recreate the same text by changing the wording using "more polite," "shorter," and "softer."
- Save creation history within the device. You can open it later, change the conditions, and recreate it.
- Simple task management (you can edit it later, and deletion can be undone with "undo")
- Save frequently used templates (register your own text and reuse it)
- Directly access from "share" or text selection menus in other apps
- Quickly access frequently used functions from the home screen widget

■ Diary (recording your feelings and gentle reflection)
- Easily record with mood, photos, and voice (voice input)
- AI drafts the beginning of your diary entry from attached photos (you can edit the generated text as is)
- Gentle reflection by AI, weekly "Summary of the Week"
- Mood trend graph, calendar (monthly/yearly view), "Today 1 Year Ago"
- Organize and filter with tags (free input + fixed tags that you can edit yourself)
- Record by specifying date and time (including past events)
- Write reminder notifications, automatic saving of drafts
- App lock with PIN (also supports unlocking with fingerprints and face)
- Export/import backups. Fixed tags will also be returned.

■ Health Notebook (Recording physical condition and supporting medical visits)
- Easily record physical condition, symptoms (including severity), body temperature, blood pressure, weight, pulse, medication, and photos.
- Enter blood pressure separately for "systolic" and "diastolic." You will be notified immediately if you enter them incorrectly.
- Only items to be entered daily are displayed; body temperature and blood pressure are grouped under "Detailed Input."
- Medication: Register the medications you are currently taking with name, dosage, timing, prescribing institution, and start date.
- AI creates a "Summary for Medical Visits" (organized in a format that is easy to communicate to doctors). A list of records and medications being taken are accurately attached.
- You can choose the period from 2 weeks, 1 month, 3 months, from the last visit, or specify the start and end dates. Sharing and saving are also possible.
- Medical Visit Records (Clinic Visit Log): You can save the date of visit, medical institution, diagnosis, prescription, and next appointment.
- Check the trends of body temperature, blood pressure, weight, and pulse in a graph. Numerical values ​​are displayed, and target lines can be drawn for weight and blood pressure.
- View symptom frequency in a graph, and check your physical condition in a monthly calendar view.
- Search records and filter by symptoms.
- Medication reminders (up to 3, at any time), "Today's Medication" check, and compliance rate display.
- PIN lock for health notes only (can be set separately from the diary. Supports unlocking with fingerprint and face).
- Export/restore backups. Medication, target values, and input suggestions are also restored.
- Open records directly from the home screen widget.
- All records are stored in an encrypted area on the device. Health information will never be leaked externally.
- This app is not intended as a medical device or for diagnostic purposes.

■ Privacy First
- AI operates entirely on the device. Input content is not sent externally.
- No data such as usage statistics or crash diagnosis is sent.
- No account required, no ads.
- Does not request permissions for camera/microphone/contacts/location information, etc. (requests only for notifications). Photography and voice input are handled by the device's standard app.

■ Preparing the AI ​​Model for the First Time
For the first time only, download the AI ​​model from the instructions on the home screen (Wi-Fi recommended). The standard is "Gemma-4-E2B"
(high quality, 8GB memory or more recommended), a lightweight version "Gemma3-1B" is also available. Once installed, it can be used offline.
The function to create diary drafts from photos requires a model that can read images (Gemma-4-E2B).

■ Pricing
Basic functions are free, and there are free trial sessions for paid functions. Billing is a one-time purchase (not a subscription), and you can purchase "Secretary," "Diary," and "Health Notebook" separately. For Secretary, translation, questions, task management, and pre-written phrases are free;
Email replies, meeting minutes, summaries, and document formatting are paid. For Diary, AI review and drafting from photos are paid. For Health Notebook, only the medical consultation summary is paid; records, photos, calendar, and backups are free. A "bundle purchase" option is available that allows you to unlock all three AI functions at once, making it more economical than buying them individually.

Supports Japanese and English.