🇺🇸 Privacy Policy

🇰🇷 한국어 · 🇺🇸 English · 🇯🇵 日本語

Makta (hereinafter "the Service") is an Android app that records and tracks the last moment of everyday actions. This Privacy Policy explains the scope of personal information collected, used, and retained by the Service, as well as user rights.

Effective Date: 2026-05-29 (v3.0)

Last Updated: 2026-05-29

Developer: Appcellent (individual developer) · Contact: [email protected]

The Service is fully usable without sign-in. A Google account login is required only when using cloud backup and multi-device sync features.

1. Information We Collect

1.1 Guest Users (Not Signed In)

Local data only — stored in the device's local SQLite database and file system.
No information is transmitted to external servers.

1.2 Cloud Backup Users (Signed In with Google)

Item	Source	Purpose
Google account ID (UUID)	Google OAuth	User identification
Email address	Google OAuth	Account display (UI), future notifications
Action definitions (name, alarm, memo)	User input	Multi-device sync
Action logs (timestamps, memos, source)	User input + widget/notification marks	Multi-device sync
Photo attachments (compressed)	User input	Multi-device sync
Device install ID (UUID)	Self-generated	Sync cursor tracking
Usage statistics (storage_used_bytes)	Server-side computed	Quota management
Payment metadata (purchase token, payment date/status, subscription product ID)	Google Play Billing	Pro subscription verification, renewal, cancellation, refunds

Not collected (cloud backup data):

Location info · Contacts · Device identifiers (IMEI, ANDROID_ID, etc.) · Advertising identifiers (AAID)

1.3 Observability Data (Optional Consent, Independent of Guest/Sign-in State)

The Service uses observability data to improve app stability and understand usage patterns, collected only with the user's explicit consent.

Item	Source	Purpose
Crash information (stack trace, device model, OS version)	Automatic on app crash	App stability improvement
Anonymous usage events (app interaction patterns)	User interaction	Usage understanding · prioritization
install_id (UUID v4)	Self-generated	Anonymous identification (regenerated on app reinstall, not linked to Google account)
Device environment (manufacturer, model, OS version, permission state)	System API	OEM-specific regression detection

Excluded from observability data (explicitly):