Tuning Fork Studio vs SternDeutsch

Tuning Fork is a tool for tone generation, instrument playback, and sound observation. Build a sound from a familiar reference pitch, then explore it through live waveforms and spectra. Customize frequency, output gain, and harmonic components. Choose sine, square, triangle, or sawtooth waves, layer harmonics, and save configurations for later use. Play notes on a piano keyboard with the included GeneralUser GS soundfont. With microphone permission, the analyzer shows a live waveform, frequency reading, input level, and spectrum on your device. Core instrument playback, custom frequency, basic waveforms, and sound analysis are free. Pro adds the complete instrument library, more waveforms, unlimited sound configurations, and longer audio exports. Prices and availability are shown in the App Store. The app does not collect your data. Microphone input is processed on-device for live analysis and is not uploaded to developer servers. Privacy Policy: https://sites.google.com/view/gly699/home/privacy_policy Terms of Use: https://sites.google.com/view/gly699/home/terms-of-use Contact: liyangong697@gmail.com

SternDeutsch is an immersive German learning tool built around an innovative 3D star-map word cloud that visualizes over 6,000 German words and their relationships as an interactive starry network. A New Way to Learn Swipe left for "known," right for "unknown," down for "fuzzy." Tap any satellite word to make it the center, drag to rotate the sphere — vocabulary learning becomes intuitive and engaging. Complete Goethe Exam Coverage Full A1–C2 Goethe reading practice tests with two modes: Test Mode with timer and auto-save, and Review Mode with exam focus analysis, answer explanations, key vocabulary, phrases, sentence grammar notes, and bilingual original/translation comparison. Weaving Review for Long-Term Retention Review quizzes generated from word association networks — pick the matching word from example sentences. Dual channels (known/fuzzy) with answer-based progression and demotion to scientifically combat the forgetting curve. Key Features • 3D star word cloud with interactive swipe gestures • 10 word sets with 6,000+ words, examples, collocations & idioms • Full Goethe A1–C2 reading practice tests • Dual mode: Test & Review, progress auto-saved • AI-powered analysis: exam focus · answer explanations · key vocabulary • Mistake collection book organized by CEFR level • Weaving review quizzes to reinforce memory • Daily learning reminders & goal celebration • Interface available in English, Chinese, and German Term of Use:https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy policy: https://honwaii.github.io/LanSternSupport/privacy.html