convertX vs Vault

ConvertX gives engineers, students, and everyday users the most complete unit converter in their pocket. 44 categories. 400+ units. Offline. EVERYDAY — FREE FOREVER Length · Weight · Temperature · Area · Volume · Speed · Time Data Storage · Pressure · Energy · Power · Angle · Fuel · Frequency LIVE CURRENCY 30 currencies updated in real-time. Works offline with cached rates. No account. No sign-up. Just convert. ENGINEERING SUITE — PRO The only converter with a complete professional engineering toolkit: Mechanical: Force · Torque · Stress · Density · Dynamic Viscosity Kinematic Viscosity · Acceleration · Angular Velocity Civil: Flow Rate · Stress Intensity · Illuminance · Concentration Water Hardness Electrical: Voltage · Resistance · Capacitance · Inductance Current Density Thermal / HVAC: Thermal Conductivity · Heat Flux · Cooling Load Specific Heat Science: Radiation Dose · Radioactivity · Molar Amount Acoustics: Sound Level · Luminous Intensity Material Science: Hardness (HRC / HV / HB / Shore) · Elastic Modulus DESIGNED FOR REAL USE • 48-point bold numbers — your result fills the screen • Dark neon UI — no eye strain in the field or lab • Tap any unit row to set it as your conversion target • Swap units with one tap — no fumbling • Copy result to clipboard instantly • Favorites — pin your most-used converters to the top • History — last 50 conversions saved automatically • 100% offline — no internet needed for any unit conversion PRIVACY FIRST No account. No tracking. No personal data collected. PRO — $4.99 ONCE, YOURS FOREVER Unlock all 29 engineering categories with a single one-time purchase. No subscription. No monthly fee. Lifetime access including all future engineering categories added to the app. ConvertX is the converter engineers reach for on-site, students use in the lab, and travellers rely on for currency — all in one place.

Vault is a private encrypted storage app for your photos, videos, notes, and documents. Everything is locked with AES-256 encryption directly on your device. Nothing is ever uploaded, synced, or shared. No account required. No cloud. No servers. Ever.   — YOUR PRIVACY, YOUR DEVICE —   Every file you store in Vault is encrypted the moment it enters the app. Photos, videos, notes, PDFs, documents — all protected by military-grade AES-256 encryption, stored only on your iPhone. Not even Vault can access your data without your PIN or biometrics.   — WHAT YOU CAN STORE —   • Photos & Videos — Import from your library or capture directly in-app. Files are encrypted instantly on arrival.
• Private Notes — Write and store personal notes behind encryption. Rich text with auto-save.
• Documents — PDF, Word, Excel, and more. View securely inside Vault without exposing files elsewhere.   — SECURITY THAT MEANS BUSINESS —   • Face ID & Touch ID — Unlock instantly with biometrics.
• 6-Digit PIN Fallback — Custom numeric keypad. Incorrect attempts trigger progressive lockout.
• Auto-Lock — App locks immediately when you leave or on shake gesture.
• Intruder Detection — Optionally capture a photo of anyone who enters the wrong PIN. Stored locally.
• Break-In Log — Full log of unauthorized access attempts with timestamp and optional location.
• Guest Mode — Set a separate PIN to show a limited, separate vault to anyone asking to see your phone.
• Secure Delete — Files are overwritten before deletion, not just removed.   — BLENDS INTO YOUR HOME SCREEN —   Choose from multiple app icon themes so Vault appears as a different utility on your home screen. Change anytime from Settings.   — PRIVATE BROWSER BUILT IN —   Browse privately without leaving a trace. No history, no cookies, no cache — automatically cleared every session.   — OFFLINE & INDEPENDENT —   Vault works 100% offline. No internet connection required (except the built-in private browser). No account to create. No email address. No recovery server. Your recovery options — security questions and a personal recovery key — are stored only on your device.   — RECOVERY OPTIONS —   If you ever forget your PIN, recover access using either:
• Security Questions — Two personal questions answered only by you.
• Recovery Key — A 6-word personal passphrase you save during setup.   Both options are fully local. No server involved.   — ONE-TIME PURCHASE. NO SUBSCRIPTIONS. —   Vault Pro is a single lifetime purchase. Pay once, own it forever. No monthly fees. No annual renewal. Try free for 2 days with full access before you decide.   — WHAT STAYS FREE —   After the trial, you can always view and access content you have already stored in Vault at no cost. Adding new content and using advanced features requires Vault Pro. Privacy Policy : https://sites.google.com/view/vaultapppt/home