SelfLock

Spec sheet

Purpose

SelfLock is an open-source Android app and website blocker for digital wellbeing, screen-time control, and focus.Read 11 Oct 2026 · github.com

Security

The README says passwords are hashed with PBKDF2-HMAC-SHA256 at 600,000 iterations and stored using EncryptedSharedPreferences.Read 11 Oct 2026 · github.com

Privacy

Rules, logs, usage, and passwords stay on-device; the project says it has no login, cloud sync, telemetry, or third-party ad or analytics SDKs.Read 11 Oct 2026 · github.com

License

The repository states that SelfLock is licensed under the MIT License.Read 11 Oct 2026 · github.com

Android requirement

SelfLock requires Android 14 or newer (minSdk 34).Read 11 Oct 2026 · github.com

App blocking

It can block installed apps by schedule or daily usage limit and show a full-screen block overlay.Read 10 Oct 2026 · github.com

Blocking rules

It can block installed apps or website domains by schedule or daily usage limit.Read 11 Oct 2026 · github.com

Enforcement limitation

The project says it cannot fully prevent removal through Safe Mode, ADB, or factory reset.Read 10 Oct 2026 · github.com

Installation

The README directs users to build from source for now; it says releases may appear as GitHub Actions artifacts and that the app is not on Google Play.Read 11 Oct 2026 · github.com

Network behavior

SelfLock says it does not send browsing or app-usage data to a server and uses internet access only to load website favicons.Read 11 Oct 2026 · github.com

Password security

The README says passwords use PBKDF2-HMAC-SHA256 hashing with 600,000 iterations and EncryptedSharedPreferences.Read 10 Oct 2026 · github.com

Permissions

Setup requires accessibility, usage access, overlay, notifications, exact alarms, and unrestricted battery settings for reliable enforcement.Read 11 Oct 2026 · github.com

Self-lock

Active rules are locked against editing or deletion, with optional master and per-rule passwords.Read 11 Oct 2026 · github.com

Supported browsers

Website blocking uses URL-bar detection in Chrome, Firefox, Samsung Internet, and Edge.Read 11 Oct 2026 · github.com

Usage statistics

It tracks daily app and matched website usage and provides statistics, budget warnings, and block notifications.Read 10 Oct 2026 · github.com

Usage stats

The app provides local usage statistics, date-range summaries, block history, and budget warnings.Read 11 Oct 2026 · github.com

Website blocking

It blocks domains by schedule or daily budget by detecting browser URL bars in Chrome, Firefox, Samsung Internet, and Edge.Read 10 Oct 2026 · github.com

Website blocking limitation

Website blocking depends on browser accessibility URL-bar identifiers, which browsers can change.Read 10 Oct 2026 · github.com

Website-blocking limit

Website blocking depends on browser accessibility URL-bar identifiers, which may change, and is not a network-level DNS blocker.Read 11 Oct 2026 · github.com

Where Specifiction places it

• Distraction Blocking Software#28 of 296.5