Privacy Policy

Applies to the Nerva desktop app (Linux, Windows), Nerva Mobile (Android) and nerva.bytical.ai. Last updated 5 November 2026.

The short version. Nerva is offline-first. Your timers, notes, tasks, habits and reminders are stored only on your device in a local database. There is no account. We never receive the content you type. The only things that leave your device are listed below, and each one is either anonymous, opt-in, or something you explicitly start.

Who we are

Nerva is made by Bytical Solutions Private Limited, India (“Bytical”, “we”). Contact: hello@bytical.ai. Source code: github.com/piyushptiwari1/nerva.

What the app stores on your device

Everything you create — workspaces, timers, notes, tasks, habits and their history, reminders, settings — lives in a local SQLite database in the app's private storage. On Android that location is inaccessible to other apps. You can export it as a single file (Settings → Data) and delete it by uninstalling the app or using Settings → Diagnostics → Reset.

What leaves your device

Data	When	Why	Control
Anonymous launch beacon: app version, operating system, platform, UI language. No identifier, no device fingerprint. Our server records the country from the request.	At most once per day while the app is open	To know roughly how many installations are in use	Settings → About → switch off
Weekly usage counts (e.g. “12 notes, 3 habits”), with a random pseudonym. Never content.	Only if you opt in on first launch	Product decisions	Opt-in; decline once and it never asks again; switch off in Settings → About
Feedback you write, your rating, and the email you optionally give	Only when you press Send	To read and reply	You choose what to send
Update check: current version	Desktop, on launch	To offer a new version	Standard auto-update; you confirm installs
Google Drive sync (Pro, optional): your backup file is uploaded to your own Google Drive using the `drive.file` scope, which lets Nerva see only the file it created	Only after you sign in to Drive in Settings → Data	Sync between your devices	Disconnect in Settings → Data; delete the file in your Drive
Pro licence: your email (for the receipt and key), the plan, a device id (random UUID) and device name	When you buy Pro and when a device activates	Issue and verify the licence	Deactivate devices in Settings → Pro
Ask Nerva (desktop): the prompt you type plus lightweight context (workspace name, running timers, open task titles) is sent to the AI provider you configured — local Ollama by default, or your own OpenAI / Anthropic / Google / OpenRouter key	Only when you ask a question	To answer it	Choose a local model; keys stay on your device

Gemini and Android App Functions

On Android 16 and newer, Nerva Mobile registers Android App Functions so your phone's assistant (e.g. Gemini) can start timers, add tasks, log habits, set reminders and read your schedule when you ask it to. These calls happen entirely on your phone between the assistant and Nerva; Nerva does not send anything to Google for this. What the assistant itself does with your request is governed by Google's privacy policy. You can turn Nerva off under Gemini → Connected apps at any time.

Notifications, alarms and permissions

Nerva Mobile asks for notification permission so timer and reminder alerts reach you, and uses exact alarms so they fire on time with the screen off. Vibration is used for optional haptic feedback. No location, contacts, camera, microphone or storage permissions are requested.

Payments

Pro purchases are processed by PayU. We receive the transaction id, amount, your email and the payment status; we never see your card details. Invoices are emailed to the address you gave.

The website

nerva.bytical.ai uses Segment for page-view analytics and records download counts with country derived from the request. Server logs are kept by Vercel for a short period for security and debugging.

Where data is kept and for how long

App data: on your device only, until you delete it. Beacon and usage counts: aggregated counts kept indefinitely; raw events for 90 days. Feedback: until handled. Licence records: for the life of the licence plus 7 years for tax. Drive sync files: in your Drive, under your control.

Children

Nerva is a general-audience productivity tool and is not directed at children under 13.

Your rights

Because the app holds no account, most of your data is already in your hands. For licence or feedback records, email hello@bytical.ai to access, correct or delete them.

Changes

We will update this page when the app's behaviour changes and note the date at the top. Material changes are also listed in the changelog.