Independent Android developer building privacy-focused, local-first apps.

I create Android applications designed around simple ownership, fewer unnecessary accounts, less dependence on cloud services, and more control over personal data.

Xsilent is a privacy-focused Android vault for photos, videos and PDFs.

Key features:

• Local AES-GCM encryption
• No account required
• No ads
• No cloud storage for the vault
• Dynamic Decoy PIN with a separate decoy vault
• Biometric protection and automatic locking
• Encrypted backup
• Encrypted Trash
• Private PDF viewer
• Clean Share with metadata removal and blur tools
• Screenshot and screen-recording protection
• Quick Lock
• Local-first design

Website: https://tsidevstudio.com/apps/xsilent

Repository: https://github.com/tsidevstudio/xsilent

Google Play: https://play.google.com/store/apps/details?id=com.xsilent.app

Security & Help: https://tsidevstudio.com/apps/xsilent/security-help

Press & Reviewer Kit: https://tsidevstudio.com/press/xsilent

Nullun is an Android tool for creating customizable status-bar visuals and battery-screen mockups directly on-device.

Key features:

• Battery level from 1% to 100%
• Android- and iPhone-inspired styles
• Custom carrier text
• LTE, 4G and 5G indicators
• Custom signal and Wi-Fi indicators
• Custom messages
• Notification text controls
• App name controls
• Background customization
• Local on-device creation
• Free creation, editing, preview and History
• Lifetime unlock for external output
• No subscription

Website: https://tsidevstudio.com/apps/nullun

Repository: https://github.com/tsidevstudio/nullun

Google Play: https://play.google.com/store/apps/details?id=com.premium.nullun

TSI Dev Studio also develops:

• MicutVault — Lightweight private media vault
• AnonyPic — On-device photo privacy tools
• Seabil — Subscription tracker
• HEZX — Price-per-use tracker
• Annum — Reminder and date tracking
• Zizly — Sleep talk recorder
• Zekro — Debt and ledger tracker
• Mission563 — Focused Android utility
• Group Decision — Group decision-making tool

Explore all apps:

https://tsidevstudio.com

• Local-first whenever practical
• No unnecessary accounts
• Minimal data collection
• Clear privacy expectations
• No unnecessary cloud dependence
• One-time purchases where possible
• Focused Android utilities
• Simple ownership
• Privacy-conscious design

Website: https://tsidevstudio.com

Google Play: https://play.google.com/store/apps/developer?id=TSI+Dev+Studio

Instagram: https://www.instagram.com/tsidevstudio

Facebook: https://www.facebook.com/tsidevstudio

YouTube: https://www.youtube.com/@tsidevstudio

X: https://x.com/TSIDEVStudio

General: contact@tsidevstudio.com

App support: support@tsidevstudio.com

Press & media: press@tsidevstudio.com