Apps Like Feld Hellschreiber for iPhone and iPad
Transmit text via sound waves.
The app decodes and transmits Feld Hell messages. Decoded text scrolls across the display, and users can type messages or send canned text.
Feld Hellschreiber screenshots
Ranked alternatives
Showing 1–20 of 1,000 ranked alternatives.
SSTV Slow Scan TV
Black Cat Systems
Decode and display SSTV transmissions easily.
The app decodes and displays Ham Radio SSTV transmissions. It automatically detects and selects image formats, with manual control available.
FT8 Decoder
Ronald Nicholson
Decode FT8 signals from audio input
Decode FT8 signals from audio or SDR sources. Support Level 1 decoding for standard callsigns or 13-character text. Generate FT8 message audio for testing. View decoded messages and metadata.
Packet Pad
Black Cat Systems
View Packet Radio transmissions on device.
The app displays Packet Radio transmissions on an iPad or iPhone. Users can view raw APRS packets and save received text for later transfer.
XKey - Randomizer Keyboard app
FAT, LLC
Create, edit, and share phrases
Create and edit canned phrase Decks for quick sharing. Send random phrases from Decks as text-only stickers. Encode hidden messages within other apps. Auto-paste phrases using Message Shooter for rapid messaging.
NAVTEX Pad
Black Cat Systems
View marine weather transmissions on iPhone.
The app displays NAVTEX and Radio Teletype (RTTY) marine weather transmissions. Users can view messages without a dedicated receiver and save or transfer received text.
PSK31
Black Cat Systems
View ham radio PSK31 transmissions now.
The app allows users to view ham radio PSK31 transmissions on an iPad. Users can place their iPad near a radio, tune to a PSK31 frequency, and see decoded text along with a waterfall display of the audio spectrum.
Morse Pad
Black Cat Systems
Decode morse code transmissions on device.
The app decodes morse code transmissions on an iPad, iPhone, or iPod Touch. It can automatically determine the sending speed and track frequency changes.
Clock Wave
震 任
Calibrate watches with time signal
Calibrate radio-controlled watches or clocks by transmitting accurate time signals. Select from global stations including WWVB, JJY, BPC, MSF, and DCF77. Place the device near the iPhone/iPad speaker for manual reception and synchronization.
Waver: Data Over Sound
Georgi Gerganov
Send messages via waves
Send and receive text messages using waves between nearby devices. Utilize audible or ultrasound communication without internet. Messages are transmitted through and received by allowing microphone access.
Calculator HD Pro Lite
Cider Software LLC
Calculate with dual-line display and multi-line input
A with dual-line display showing input and result. Supports multi-line equations and tap-to-move cursor. Saves calculation history with timestamps and labels. Allows emailing calculations and swiping to review previous entries.
ACARS
Black Cat Systems
View ACARS transmissions on mobile devices.
The app displays ACARS aircraft transmissions on an iPad, iPhone, and iPod Touch. Users can save decoded packets to a file for later viewing or transfer to a computer.
Aryeo Go
Aryeo, Inc.
Edit schedule, send updates, share media
Manage real estate photography tasks by viewing and editing schedules, sending status updates to clients, and downloading or sharing media. Track team locations and reschedule appointments. Manage listings and media files directly from the field.
Smart uDA
Apolo Electronics Company Limited
Send photos via Bluetooth to AP radio
Send photos via Bluetooth to AP radio devices. Edit images by cropping or selecting from the gallery. Transmit edited or original photos directly to AP radio products.
Speaker Intercom
Raymond Jones
Broadcast audio to any
Broadcast audio to any room with a compatible via Bluetooth, AirPlay, Google Cast, or other supported hardware. Use phone as a walkie-talkie to connect with users on the same Wi-Fi network.
MobileFRG (Field Responder Guide)
Priority Dispatch Corp.
Receive and interpret response codes
Medical "Access response codes and interpret their clinical meaning. View detailed explanations for dispatch descriptors. Retrieve field guidelines and check protocols. Search for specific medical procedures and instructions."
BART Watch
Elerts Corporation
Report suspicious activity and send alerts
Report suspicious activity by sending text messages or photos directly to Police. Share location data with authorities. Disable camera flash for discreet use. Access a reporting interface from the home screen.
How we rank alternatives
Apps are ranked by functional similarity, category fit, rating confidence, and popularity.