DidI

DidI is a smart lifelogging app designed to capture a clear, searchable record of your days without forcing you to write long journal entries. DidI automatically collects movement, location, and foreground app usage in the background and assembles these signals into a readable timeline, so you can review what happened, attach a feeling or short note, and reflect later with minimal effort.

Key features and overview

The core of the experience is an automated chronological map that groups inferred activities—like commuting, working at an office, studying in a cafe, or walking in the park—into digestible timeline cards. Each night the app generates an AI summary that highlights trends and notable moments, alternating between warm encouragement and objective insights to help you notice patterns over time. You can tag entries with feelings, add short context notes, and search or filter the timeline by place, activity type, or app usage to quickly find specific moments.

How it works

DidI runs a local-first pipeline: sensor and location data are analyzed on-device to infer activities and build the timeline. When you enable optional encrypted backups, that backup data is protected with AES-256; the app also makes clear when any server-side or temporary processing is used for AI summaries and does not use personal data to train external models. Because inference is automated, occasional misclassifications can happen, but the timeline is editable so you can correct or enrich entries easily.

Controls and interaction

Interacting with the timeline is simple and tactile. Tap a timeline card to expand details, edit the detected activity, or add a short note; long-press to apply an emotion tag or bulk-edit multiple entries. A dedicated editor lets you create manual entries if you prefer to log something the app didn’t detect. Settings provide per-permission toggles for background location, motion sensors, and app-usage tracking so you control which signals are used. Notifications are configurable for nightly summaries, milestone reminders, or optional habit nudges.

Progression, habit tracking and challenge systems

Beyond passive logging, DidI supports lightweight progression through habit tracking and trend visualization. Habit goals are optional: you can mark activities you want to repeat, view weekly and monthly summaries that show consistency, and enable gentle reminders or streak indicators to keep a habit going. These systems are intentionally unobtrusive—designed to encourage reflection and consistency rather than gamify every action—so you retain control over which goals matter to you.

Visual style and timeline structure

The app presents your day in a visual diary format that emphasizes clarity: compact activity cards, small map previews for location-based entries, and a timeline density control that lets you switch between a condensed overview and a more detailed hourly view. Days, weeks and months are the primary units for browsing history, and each unit surfaces quick stats like time spent at home, at work, or in transit, plus the top-used apps for that period. Screens maintain a clean, readable layout across different screen sizes.

Customization, replay value and offline use

Customization options allow you to choose privacy levels, visual themes (light and dark modes), timeline density, and which activity types are shown by default. Replay value comes from the ability to skim past weeks, compare trends across months, and rediscover forgotten moments using search and filters. Because DidI processes most data locally, core features continue to work offline and resume syncing only when you permit backups or network-based features.

Accessibility and user experience

The app offers adjustable font sizes, high-contrast visual options, and compatibility with Android accessibility services so users with different needs can navigate timelines, edit entries, and receive summaries. Controls are placed for easy reach, and onboarding walks you through permission choices and privacy settings so you understand how data is used. Performance optimizations keep background processing lightweight to preserve battery life.

Privacy and limitations

DidI emphasizes privacy with on-device processing by default and optional end-to-end encrypted backups. Users should be aware that automatic inference can sometimes misclassify activities or miss contextual nuance, and several features depend on background permissions such as location or sensor access; disabling those will limit what the app can infer. Nightly AI summaries are concise by design and may not capture every personal detail, so manual edits or notes can help preserve important context.

Who this is for

This app is useful if you want a low-effort diary, a way to track habits and productivity trends, or a searchable record of where time is spent without manual journal maintenance. Whether you’re reflecting on your week, tracking study or work sessions, or simply trying to remember small moments, DidI offers a private, configurable timeline that makes remembering easier and supports mindful review over time.