AUFX:Push is a highly tweakable stereo dynamics processor designed for iPhone. Developed by Kymatica AB, this app offers a range of features including a noise gate, compressor/expander with external side-chain input, and a limiter/clipper.

With AUFX:Push, users can achieve anything from subtle compression to extreme pumping, and even maximum loudness. The app utilizes a high-quality 32-bit DSP engine, ensuring top-notch audio performance.

Some notable features of AUFX:Push include the ability to use negative ratios for pumping and cancellation effects, adjustable knee with soft or hard options, and built-in side-chain low/high cut filters with a monitor toggle. The app also supports external side-chain input through Inter-App Audio or Audiobus.

Users can take advantage of the built-in noise gate, brick-wall lookahead limiter, and hard/soft clipper for precise sound shaping. AUFX:Push also supports "parallel compression" and offers RMS/Peak envelope followers with customizable attack, release, and hold time.

The app allows for seamless integration with other apps through Inter-App Audio or Audiobus, making it a versatile tool for audio processing. Users can save, load, and share their own presets, and the app comes with several bundled presets to get started. AUFX:Push is fully MIDI controllable, supports background audio, and even allows users to record their results directly within the app.

Overall, AUFX:Push is a powerful and comprehensive stereo dynamics processor that offers professional-grade audio processing capabilities on the iPhone platform. Whether you're a musician, producer, or audio enthusiast, this app provides a wide range of tools to enhance your sound.