RadexReadMap vs SendBySound

With RADEX RD1212-BT you can plot your radiation readings right onto the map! Share your radiation readings and see what the others have been finding too. Join the global community of concerned people just like you who can now share the data from their device by plotting it on the World Map by using RadexReadMap mobile app.

SendBySound transforms your text into sound waves, letting you share messages with nearby devices using nothing but audio. No internet connection, no Bluetooth pairing, no accounts — just pure sound. HOW IT WORKS Type your message, tap Send, and your device plays an encoded audio signal. Any nearby device running SendBySound (or listening at SendBySound.com) can instantly decode and display your message. It's like a modern-day morse code, but automatic and instant. PERFECT FOR - Sharing Wi-Fi passwords, contact info, or quick notes - Sending messages when internet is unavailable - Transferring text between devices without pairing - Tech demos and educational purposes - Situations where privacy and offline capability matter KEY FEATURES ◆ No Internet Required Works completely offline. Your messages travel through sound, not servers. ◆ No Accounts or Sign-up Open the app and start sending. No registration, no personal data collected. ◆ Cross-Platform Compatible Send messages between iPhone, iPad, and any web browser at SendBySound.com. ◆ Private by Design Messages are transmitted directly between devices via sound waves. Nothing is stored in the cloud. ◆ Multiple Sound Modes Choose between audible tones or near-ultrasonic frequencies for quieter transmission. ◆ Simple & Fast Just type, tap, and transmit. Receiving is equally easy — tap Listen and hold your device near the sender. TIPS FOR BEST RESULTS - Keep devices within a few feet of each other - Minimize background noise for clearer transmission - Use audible mode for maximum reliability - Works great for messages up to 133 characters Whether you're sharing a quick note in a meeting, sending info to a friend's phone, or just exploring a clever new way to communicate — SendBySound makes it simple, private, and fun. Download now and experience the magic of data over sound!