GigFast Lite is a guitar amp simulation and effects plugin based on Neural Amp Modeler (NAM) technology. It functions as a NAM loader, supports loading parametric NAM models as well as snapshot NAM files (three per preset with channel switching), and includes built-in effects such as a noise gate, overdrive, IR loader, and reverb. 

The software is available as an AUv3 plugin and standalone application and runs on iOS (iPhone, iPad) and macOS.

There is a free version and a commercial version. The free version includes:

• Amp models: Access to a very limited selection of pre-installed parametric amp models (often just a few for demonstration purposes). 
• NAM Import: Loading your own .nam profiles is not possible. 
• Effects: Only a minimal selection of basic effects is available; many modern effects (such as chorus, delay, wah) are disabled. 
• IR Loader: Importing your own impulse responses (IRs) for speaker cabinets is disabled; only a few internal options may be available. 
• MIDI & Tuner: Advanced MIDI control and the precise strobe tuner are often not fully functional or are disabled. 
• Usage Duration: The app can be used for free indefinitely, but only with these limited features (there is no time limit for the basic version, but there are functional restrictions).

Without purchasing the upgrade, the app is essentially just a player for the included demo amps. To use it as a full-fledged tool (loading your own NAMs, full effects chain, MIDI control), the upgrade is absolutely essential.

See this YouTube Video.

GigFast Lite is a guitar amp simulation and effects plugin based on Neural Amp Modeler (NAM) technology. It functions as a NAM loader, supports loading parametric NAM models as well as snapshot NAM files (three per preset with channel switching), and includes built-in effects such as a noise gate, overdrive, IR loader, and reverb. 

The software is available as an AUv3 plugin and standalone application and runs on iOS (iPhone, iPad) and macOS.

• Amp Models: Full access to all current and future parametric amp models from ArteraDSP (currently 8 multi-channel amps such as the MJM-800, ARC-050, INV-120, EVN-513, etc.). 
• Unlimited NAM import: You can load and use an unlimited number of your own .nam files (Neural Amp Modeler Profiles).
• Complete effects suite: Unlock all built-in effects, including overdrive, noise gate, parametric EQ, wah, chorus, stereo delay, and reverb. 
• Full IR support: Import and use your own IR cabinets (impulse responses) and access all included IRs.
• Pro Tools: Use the high-precision strobe tuner and full MIDI compatibility (for channel switching and automation).
• Audio processing: Full access to the audio processing chain without throttling.

See this YouTube Video.