Backup Contacts Cleaner Pro vs RF-Toolbox Pro Usage & Stats

Contacts Backup helps you to backup, restore and save all your precious contacts! Also, you can easily transfer all your contacts from your phone to another phone with just one tap! It’s an easy app that keeps your contacts safe and secure! The easiest and the contact saving app that supports your iPhone! -> No Ads -> Your contacts are saved! even if you lose or break your phone! -> The easiest way to Secure your contacts - Just One Tap. -> Completely safe, secure and fast. ***** Features ***** -> Safe & secure contact backup. -> You can manually sync with the Backup button. -> Small in app size (~15Mb). -> Simple and to the point app and it does as it says. ***** This is how it works: ***** --> How to back up the contact list: 1. Download the Contacts Backup App on your iPhone 2. Go to Backup Screen 3. Press ”Backup” button in the app 4. Press "Email" after completed backup 5. Your contacts are now safely stored! Customer Care: We love to hear from you – so feel free to contact us at: FB: https://www.facebook.com/Cheepapps-684007881726733/ Email: cheepapps@gmail.com

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RF-Toolbox Pro

Specialized on high frequency electronics for RF professionals, radio amateurs and students. RF-Toolbox is based on the popular Electronic Toolbox by Marcus Roskosch. This app contains some of the common tools of Electronic Toolbox but contains a wide range of additional tools, specialized for high frequency electronics, RF professionals, radio amateurs and students. Currently RF-Toolbox consists of more than 90 tools and like Electronic Toolbox, there are more to come over the time. Feature list: ■ PCB Trace Width (Internal and external Traces) ■ PCB Trace Resistance ■ PCB Trace Impedance (various trace types e.g. Microstrip, embedded Microstrip, Symmetric and Asymetric Stripline, Wire Microchip, Wire Stripline, Edge Coupled Microstrip and Stripline) PCB Crosstalk (Microstrip and Stripline) ■ LC L/T/Pi Match calculation ■ Coax Cable calculation (Standard and individual Types) ■ Amplifier and Attenuator cascade calculation ■ SWR / Reflection / Return loss conversion ■ Power Divider (Branchline, Ratrace and Wilkinson) ■ Capacitor Plate calculation ■ RLC Parallel, Series and Circuit calculation ■ Noise Figure conversion ■ Skin Depth calculation (various materials from Aluminum to Silver) ■ Butterworth Filter (also with plot of filter chart) ■ Chebyshev Filter (also with plot of filter chart) ■ R-C, L-C, R-L High/Low/Band-Pass Filter ■ RF Units conversion (quick conversion of frequently used units) ■ Air coil inductance calculation ■ Resistors, Capacitors, Inductors in Parallel / Series And there is much more... ■ Aktive Filter calculation tool ■ Antenna calculation tool ■ Delta Star calculation ■ Cable length / ampacity tool ■ PTC / NTC Temperature Resistance conversion ■ AC Ohms law tool ■ Zener diode circuit calculation ■ Constant current source tool ■ ASCII Table ■ Desktop calculator ■ Resistor/Capacitor/Inductor combinations tool ■ 4-20mA conversion tool ■ Passive cooling calculator ■ Audio Oscilloscope Please check out more screen shots on my website (WEBSITE Link on the left side). If you have questions, please feel free to contact me by using the Support button here, inside the App or on my website. Thank you! Marcus Roskosch