Small apps. Sharp tools. Used daily.
CellHubs builds focused software for phones and the browser: a lunar calendar families rely on, driving-test prep, a verified timestamp camera, a metadata editor and ADB in your browser.
Everything we ship.
9 apps and developer tools, each with its own page, store links, privacy policy and terms.
Lifestyle Lịch Âm Việt
Lunar and solar calendar with auspicious days, zodiac hours, lunar date converter and annual death-anniversary reminders. No annoying ads.
- Android
- iOS
- Web
- Windows
- Linux
Education Thi Lái Xe – 600 câu hỏi
Practice the full 600-question bank for motorbike and car licences with mock exams, topic drills and clear explanations.
- Android
- iOS
Education Thi Lái Xe – 120 câu mô phỏng
120 simulation situations with clear video, detailed solutions, mock exams and progress tracking for B1, B2 and C licences.
- Android
- iOS
Photography ExifTool
Quickly view, modify or remove EXIF, GPS, IPTC and XMP data from photos, video and audio on Android. Free and offline-capable.
- Android
- iOS
Tools Total Media Converter
A fast, simple tool for converting between media formats including photos, video and audio.
- Android
Developer Tools ADB Kit
A local-first workspace for Android in your browser and on your phone: mirror and control a device, capture screenshots and recordings, install APKs, stream logcat and move files over USB or Wi-Fi.
- Web
- Android
- iOS
Photography SnapID Mark
Stamp trusted time, GPS, address, weather, a SnapID code and a QR onto every field photo. Photo clock-in with geofences, works offline, publicly verifiable.
- Android
- iOS
- Web
Tools GreenTunnel VPN
A free local VPN that runs entirely on your device: DPI bypass, encrypted DNS (DoH/DoT/DoQ), ad and scam blocking. No middleman servers, and your browsing is never collected.
- Android
- iOS
- Windows
- Linux
Lifestyle WidgyKit
Clocks, weather, events, calendar, habits, countdowns… every home-screen widget in one app, in one matching style. Free to start on iOS and Android.
- Android · soon
- iOS · soon
Few features. Done properly.
ADB Kit — Android debugging without installing anything
Plug in a phone, open the browser, and mirror, record, install APKs and stream logcat. Runs locally over WebUSB. An Android companion app is coming soon.
Open ADB Kit →Platforms
Android, iOS and the web, with the same care on each.
Fluff
No bloated onboarding. Open, do the thing, close.
Languages
This site is available in six languages, with apps built for Vietnamese users first.
Policies you can find
Every product has its own Privacy Policy and Terms of Use page.
Learn something useful.
Practical guides on metadata, ADB, lunar dates, driving tests and more.
Aesthetic Home Screen Ideas: 6 WidgyKit Setups to Try
Six aesthetic home screen setups built with WidgyKit widgets: minimal, productivity, frosted glass, kawaii, seasonal and family abroad, with step-by-step layouts.
6 Android Debugging Myths: ADB Without Installing Anything
Think ADB needs root, Android Studio or a terminal? Six common myths about Android debugging, what is actually true, and how to use ADB from a browser tab.
Your Phone Photos Leak More Than You Think: 7 Hidden Details
A photo file can carry your location, device, editing history and even a preview of what you cropped out. 7 hidden details and how to remove them.
Pick one. Install it. Tell us what you think.
Feedback shapes the roadmap. Write to [email protected].
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