TGSpeechBox vs akous

TGSpeechBox is a high-quality speech synthesizer that works as a system voice with VoiceOver and as a standalone text-to-speech app. Features: • 26 languages with natural-sounding speech • Full VoiceOver integration — use as your primary system voice • 7 voice presets plus YAML-defined voice profiles • Deep engine tuning: pitch mode, voice tone, formant sharpness, inflection, tremor, breathiness, and more • Phoneme editor: fine-tune individual speech sounds with live preview • Pronunciation dictionary: add custom word pronunciations with IPA override support • Stress, compound, and character dictionaries for advanced control • Export and share your customizations • Adjustable sample rate (11025–44100 Hz) • Rate override and rate boost for VoiceOver • Language lock: keep your preferred language regardless of system setting • Runs entirely on-device — no internet required, no data leaves your phone TGSpeechBox uses a Klatt-style formant synthesis engine with eSpeak-ng for phoneme generation. It is open source under the MIT license. Built by a blind developer, designed for accessibility from day one.

akous generates immersive ambient soundscapes from text descriptions using on-device AI. Powered by CoreML and Apple Silicon, akous runs a diffusion transformer model entirely locally — no internet required, no data ever leaves your device. Describe any soundscape and hear it come to life in seconds. KEY FEATURES • Text-to-soundscape generation with an on-device diffusion transformer (DiT + VAE) • Persistent library — every generation saves automatically and replays instantly without re-running the model • Built-in mixer with 5-band creative EQ, dual LFOs, granular synthesis, binaural beats, and pink/white/brown noise generator • 9-stage professional post-processing pipeline (DC removal, glitch repair, edge fades, HPF/LPF, peak limiter, spectral de-esser, air control, soft clip) • Curated catalog of 300+ preset prompts across nature, urban, ethereal, cinematic, and lo-fi categories • Daily prompting tips and one-tap "Surprise Me" inspiration • Advanced quality controls: denoising steps (4–32), noise temperature, seed control, automatic quality gate with smart retry • One-time in-app purchase unlocks unlimited generations and high-quality WAV exports REQUIREMENTS iPhone XS or later, iPad Air (4th gen) or later, or iPad mini (6th gen) or later. iOS 17.0+ and 4 GB RAM for optimal functionality. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/