RST 599x
CW QSO Simulator with pileup
About
This app simulates real-time CW QSO interactions for amateur radio enthusiasts. It offers various QSO styles, realistic signal conditions, and customizable station settings for an authentic experience. Features include pile-up reproduction and RIT/filter functions.
What's New in RST 599x
4.4.0
March 21, 2026
Improved stability.
Developer apps
FAQ
What types of CW QSO are supported by RST 599x?
RST 599x supports "599BK type QSO", "Rubber stamp type QSO", and "Contest type QSO" (specifically "AADX Contest" style). This allows users to practice different communication styles common in amateur radio.
Does RST 599x simulate realistic radio conditions?
Yes, the app aims for realism by varying call signs, signal levels, and CW speeds for each QSO. It also includes features like QRN (noise) ON/OFF selection and QSB (fading) in certain modes.
Can I customize my own station's settings in RST 599x?
Absolutely. You can arbitrarily set the call sign and CW speed of your own station when issuing a CQ. This provides a personalized training environment.
What are the key simulation features in RST 599x?
Key simulation features include the reproduction of pile-ups (being called by up to 3 stations simultaneously), RIT and CW filter functions with adjustable bandwidth, and a realistic signal meter.
How does RST 599x handle progress tracking or scoring?
RST 599x allows you to select the number of QSOs to communicate (5 or 20). It also supports a Score Clear button for your Hi-Score Data and a capture function for the Hi-Score dialog.
Is RST 599x available on all Apple devices?
RST 599x is supported on iPhone and iPod. It also supports keyboard input from Apple Silicon Macs, but it is not compatible with iOS devices in general.
What is the price of RST 599x?
RST 599x is a paid application, priced at $1.99. This one-time purchase grants you access to all its simulation features.
How often is RST 599x updated?
The latest version, 4.4.0, was last updated on March 21, 2026. While this indicates a recent update, the frequency of future updates is not specified.
