This app measures the real-world round trip latency of an iOS audio system. It plays test tones and records their return to calculate latency, requiring a loopback cable connection.
1.0.5
April 18, 2026
- Fixes a bug where buffer sizes were not set correctly on iOS 18
Round Trip Latency Meter is used to measure the real-world round trip latency of an iOS audio system. This helps users understand the delay in their audio setup.
It plays short test tones and simultaneously records the tones as they return to the input. This process requires a loopback cable to connect the audio system's input and output.
You will need a loopback cable to connect the input and output of your audio system. The app is designed to work with iPhones and iPods paired with external audio interfaces.
The app supports iPhones and iPods. It is designed to test the audio system combination of these devices with particular external audio interfaces.
No, Round Trip Latency Meter is a paid application. It is available for purchase at $9.99.
The latest version is 1.0.5, last updated on April 18, 2026. The app was originally released on August 24, 2018.
Round Trip Latency Meter has an age rating of 4+. This indicates it is suitable for a wide range of users.
No, Round Trip Latency Meter does not contain advertisements. It is a paid application without any ad interruptions.
