Content rating
Everyone
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Content rating
Everyone
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About this app

NumCase is a minimalist, high-performance number base converter and real-time calculator designed for developers, students, and mathematicians who value privacy and speed.
Built with a focus on "Privacy by Design," NumCase operates 100% offline. Every conversion, calculation, and history log is processed and stored locally on your device's secured sandbox. No data is ever transmitted to the cloud.
Core Features:
• Multi-Base Converter: Effortlessly switch between Binary, Octal, Decimal, Hexadecimal, and ASCII formats with a clean, modern interface.
• Real-Time Expression Solver: Solve complex mathematical equations across different number bases instantly.
• Secure History Journal: Keep track of your past conversions with a local history log. Your data is stored in an offline Room database and can be cleared with a single tap.
• Interactive User Guide: Learn the logic behind base conversions with an integrated, static educational guide—no internet required.
• Premium UI/UX: Experience an elegant dark-mode design featuring smooth ambient auras and glassmorphic components that minimize eye strain.
Why Choose NumCase?
• Zero Tracking: No analytics, no SDKs, and no background trackers.
• Zero Permissions: No intrusive hardware or location permissions required.
• Maximum Speed: Optimized for local computing, providing instant results without network latency.
• Clean Aesthetic: A professional developer tool that looks as good as it functions, utilizing Material 3 design principles.
Whether you're debugging code, studying computer science, or performing quick bitwise math, NumCase provides a secure and elegant environment for all your numerical needs.
Minimalist offline base converter & calculator for Binary, Octal, Decimal & Hex.
Updated on
Jul 11, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
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No data collected
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What’s new

Initial production release of NumCase!
- Effortless base conversion for Binary, Octal, Decimal, Hexadecimal, and ASCII.
- Real-time mathematical expression solver with multi-base support.
- Secure, 100% offline local history logs using Room database.
- Elegant, minimalist "Aura" dark theme for a focused developer experience.
- Interactive compiler guide to master number system conversions.
Content rating
Everyone
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App support

Phone number
+254702028253
About the developer
SIMPSON LANE SERVICES LIMITED
stinyojohn@gmail.com
Harambee Avenue, Plot No. 209/4789, Cbd, Starehe District PO Box 7378 - 00200 City Square Nairobi Kenya
+254 702 028253

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