The Tool Desk
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What Nuo combines
Chandra describes Nuo as a workspace for notes and tasks, aimed at reducing the effort of keeping those in separate apps. Its notes use a block editor with slash commands, reorderable blocks, checklists, code blocks, tables, and embedded tasks. The task side includes a My Day view, priorities, due dates, groups, and lists.
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Nuo also displays Google Calendar events and can export dated tasks to the calendar. It supports ordinary shared groups as well as private groups whose contents, according to Chandra, are encrypted in the browser before reaching the server. The “Notion meets Microsoft To Do” description is a shorthand for the combination of a flexible note editor and task management, not an affiliation with either product.
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How the reported encryption and recovery design works
Chandra says Nuo generates a random 256-bit master key in the browser and uses AES-256-GCM to encrypt secure rows. In this design, the server stores ciphertext for those rows rather than their decrypted content. A passphrase is processed with PBKDF2-SHA256 at 600,000 iterations to derive a wrapping key, which protects the master key. Changing the passphrase therefore requires rewrapping that key, rather than encrypting every row again.
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Recovery depends on a separate phrase
The master key can be represented as a 24-word BIP-39 recovery phrase. That phrase is a recovery mechanism, not merely another way to log in: losing access to the passphrase and the recovery phrase could leave the encrypted content inaccessible. A reader considering this approach should treat the phrase as sensitive backup material and keep it somewhere secure and separate from the device or account it protects.
Private groups have boundaries
Chandra says secure groups cannot be shared. That limitation follows from the described design: sharing encrypted content with another person would require a way to exchange or manage keys for multiple users. The author also reports database checks intended to reject secure records without ciphertext or with plaintext titles, and to prevent secure groups from being shared.
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These are descriptions by the developer, not findings from an independent code review or security audit. The reported cryptographic parameters explain the intended design, but they do not by themselves establish that an implementation is secure or that every sensitive field is encrypted.
Why calendar sync is intentionally one-way
Nuo does not attempt full two-way synchronization. In Chandra’s description, Google Calendar owns the events Nuo reads and displays; Nuo owns its tasks. When tasks have due dates, Nuo represents them in Google Calendar as one digest event for each day, rebuilding that digest when tasks for that date change.
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If a digest event disappears from Google Calendar, Nuo detects the removal and asks whether to delete the associated tasks or keep them. This ownership boundary avoids treating a calendar event and a Nuo task as interchangeable records that must be kept in sync in both directions.
For work spanning several dates, Chandra says the app queries multiple daily windows together rather than issuing a separate database query for every date or fetching one oversized date range. That is an implementation choice described by the author, not a published benchmark showing how it performs against other approaches.
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How a PWA became an Android app without a Kotlin UI
The release path starts with a mobile-first PWA, including a service worker, an install manifest, and a persisted query cache. Chandra says Bubblewrap wraps the PWA as a Trusted Web Activity (TWA), producing an Android package that displays the website full-screen in Chrome. The web app and Android package can therefore use the same application code rather than separate web and Kotlin interfaces.
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Release details that can trip up a TWA
- Digital Asset Links: The association between the website and Android app needs the relevant signing fingerprints. Chandra calls out both the upload key and the Google Play app-signing key.
- Version code: Android requires the new package’s versionCode to be higher than the version already in Google Play.
- Build defaults: The author advises checking Bubblewrap’s release optimization defaults rather than assuming they are suitable for every release.
These are practical points from the developer’s account, not version-specific setup instructions. Tooling and Play release requirements can change, so a developer following this route should verify the current Bubblewrap and Android publishing guidance before building.
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What the reported tests do—and do not—show
Chandra reports more than 800 Vitest unit tests, plus Playwright flows in Chromium, Firefox, and WebKit. The author also describes PostgreSQL CHECK constraints for encrypted-data invariants, including requiring ciphertext and prohibiting a plaintext title for secure rows, as well as prohibiting sharing secure groups. These test counts and safeguards have not been independently run or validated here.
Date handling received particular attention. The developer says tests now switch among seven timezones after a UTC-only setup failed to expose a due-date shift; Playwright emulation covered India and Los Angeles. That history illustrates a concrete failure mode for task apps: a date intended as a calendar day can move when code or tests treat it as a UTC timestamp. It does not establish that every timezone or date-boundary case is covered.
Availability and what remains unverified
Chandra’s article says Nuo is available on Google Play and at nuo-app.vercel.app. The developer also describes the app as free, without ads, and says it does not sell user data. Those are statements from the author; current availability, uptime, features, and data practices have not been independently confirmed.
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