SumizAI vs Trudido

What Trudido is

What Trudido is

Trudido is an offline task manager and notes app for Android that stores everything locally on the device — no account, no cloud, no tracking. The app combines smart task creation, advanced organization, calendar and list views, Markdown notes, and SHA-256 encryption, offering full data ownership through import and export. It was built in Spain, in the EU, which matters to some users in the context of data protection regulations.

Key features

Working fully offline means the app runs without internet access and requires no account — all data stays on the user's device from the very first launch. Calendar and list views let you switch between a time-based perspective and an overview of tasks grouped by topic, depending on what's needed at the moment. Markdown notes accompany tasks, allowing context, links, or checklists to be added without leaving the app. SHA-256 encryption protects data stored locally, and personalization through Material You and multiple color themes matches the app's look to the rest of the Android system. Import and export guarantee the user is never locked into one app's format.

Who it's for

Trudido appeals to Android users who value privacy and full control over their data without sacrificing functionality — people who want a task manager as full-featured as popular cloud apps, but without sending anything to outside servers. EU residents sensitive to GDPR compliance, and people working in places with limited or unreliable internet access where an app requiring a constant connection would be impractical, find a natural fit in Trudido.

Use cases

In practice, Trudido works well for planning a day by splitting it into time-bound tasks and looser notes without time pressure, visible side by side in the same app. Someone traveling without reliable internet access can manage their task list without the sync interruptions typical of apps requiring a constant cloud connection. A student preparing for exams combines tasks (what to read and when) with Markdown notes containing material summaries, all encrypted and available only on their phone.

Pricing and business model

Trudido is entirely free and open source under the GPL-3.0 license. No ads, no tracking, no paid plans — the code is publicly available for review and modification. That model, rare among Android task management apps dominated by subscriptions and ad-supported freemium, is possible thanks to the low cost of maintaining an app that runs entirely locally, with no backend servers to pay for.

Limitations and what to watch for

The absence of built-in cloud sync, which is the foundation of Trudido's privacy, also means no automatic access to tasks from multiple devices at once — a user wanting the same data on a phone and a tablet has to rely on manual export and import or their own file-sync mechanism. The app is Android-only, so iPhone users have no access to it. As a smaller open-source project, Trudido may develop more slowly than large, commercial task management apps.

AI notes saved locally and offline

Trudido has no built-in AI model integration, but its local, encrypted nature makes it a good place to store ai notes from conversations with an assistant, for people who don't want such notes ending up in any outside cloud. Pasting a fragment of an AI conversation in as a new Markdown note in Trudido is simple, though entirely manual — there's no automatic mechanism that captures the conversation and turns it into an ai notes entry without the user copying and pasting.

Encryption as a default state, not an add-on

In many apps, data encryption is an option to switch on in settings that's easy to overlook — in Trudido it's part of the core architecture from the start. For the user, that means even ai notes pasted in there from conversations with an AI assistant are protected by the same SHA-256 mechanism as the rest of the data, with no extra configuration required.

GDPR compliance as a practical consequence of architecture

Because Trudido never sends any data to outside servers, the question of compliance with European data protection rules largely resolves itself — there's no server where data could be mishandled or shared with third parties. That's a real advantage for EU users, for whom GDPR compliance isn't an abstract legal requirement but a practical matter of trusting the tool.

What's worth checking before choosing

Before making Trudido your main task manager across multiple devices, check whether the lack of native cloud sync is acceptable to you, and test the export and import process to make sure moving data between devices is convenient enough for your workflow.

Open code as a guarantee for encryption

Because Trudido is a GPL-3.0 project with publicly available code, the claim about SHA-256 encryption doesn't have to be taken on faith — any developer can read exactly how the data is secured. That's a rare approach among apps advertising data security, many of which remain closed code impossible to independently verify. For technical users, that is one more reason to trust the privacy claims more than they would with a typical closed app from the Google Play Store. It is a small distinction for the average user, but an important one for anyone who wants to make an informed decision about where they keep their data.

Bottom line

Trudido is a solid, fully offline, encrypted task and notes manager for Android users who value privacy over the convenience of automatic sync. Anyone who wants ai notes from AI assistant conversations to land there automatically instead of through manual copying should consider a tool built specifically around that workflow.

Comparison with SumizAI

Trudido and SumizAI share a concern for data privacy but differ in content source and platform. Trudido is a local, encrypted task and notes manager for Android, entirely manually maintained by the user. SumizAI generates ai notes directly from a conversation with an AI model, saving them as Markdown files in a vault the user owns, independent of platform. Anyone looking for an offline, encrypted task manager for Android will pick Trudido; anyone who wants ai notes from AI conversations to arise automatically without manual pasting will find SumizAI a better-fitting tool for that purpose.

What SumizAI is

A note-taking application built around a conversation with an AI model. You ask a question, the answer streams back, and the answers worth keeping become Markdown notes — filed into a vault that is a folder on your own disk.

A vault is a directory holding base.md, a generated table of contents up to six levels deep, and a notes/ folder with one .md file per note. Before a note is written it is checked against the ones already there, so the fourth note about the same idea gets merged instead of added. Links between notes are ordinary Markdown links to files that exist.

The model is never ours: you bring your own API key to one of seven providers — Anthropic, OpenAI, Gemini, Groq, OpenRouter, a local Ollama or your own server — and pay that provider directly. A question sends the table of contents plus at most five relevant notes within a 24,000-character budget, and the app shows you which five it used.

Every answer kept this way becomes one of these ai notes, ready to search again months later without hunting back through old chats.

Side by side

Where they differ

• AlternativeTo's description of Trudido does not mention an AI model. That is the whole starting point in SumizAI: you have a conversation with a model on your own API key, and the answers worth keeping become notes without you filing them.
• Trudido is open source (GPL-3.0), and SumizAI is not. If reading the source is what decides it for you, that is a real argument for Trudido. The guarantee SumizAI offers instead is structural rather than legal: the notes are Markdown files in a folder you chose, so they open in any editor whether or not the application is running.
• Both keep Markdown, which makes moving between them mostly a matter of copying files. In SumizAI a vault is a directory holding base.md — a generated table of contents — and a notes/ folder with one .md file per note.
• Trudido advertises encryption. SumizAI answers the same worry a different way: on the desktop the notes never leave your disk, and the material a question sends to the model is capped at the table of contents plus at most five notes — and the app shows you which five it used.
• Trudido also does tasks. SumizAI does not — no boards, no due dates, no projects. It files knowledge, not work.
• Both export. SumizAI exports a whole vault as a PDF — summary or full detail — or as a .pptx deck in table-of-contents order, with fifteen slide themes.
• Both are run from the EU: SumizAI's operator is registered in Poland and the servers are in Germany.

Which one to pick