NEW IN VERSION 2.0.1 German Voice Check • If no German voice is installed on your device, DE Flow now tells you up front — with a one-time launch hint and a status row at the top of Settings › Speech. The Standard, Analog Signal, and Synthwave Echo modes will all sound right as soon as you add a voice via Settings › Accessibility › Spoken Content › Voices › German in iOS.

NEW IN 2.0.0 NOW COVERING A1-B1 LEVELS! Full A1–B1 curriculum: 45 lessons across three levels. Thirty new lessons added — 15 covering A2 topics (Perfekt, modal verbs, Relativsätze, Passiv, Futur I) and 15 covering B1 (Präteritum, Konjunktiv I, Passiv with modal verbs, comparative clauses, discourse markers). Level filter in the lesson list lets you browse by A1, A2, or B1 at a glance. Two new ambient tracks — "Nebelmeer" (Ab Lydian, 50 BPM) and "Zwielicht" (C Phrygian Dominant, 58 BPM) — add a synthesized trumpet voice with a slow, swelling attack that evokes reversed tape recordings. 8 generative ambient tracks total. Nerd Mode: new Trumpet section with 4 parameters (attack, filter cutoff, resonance, mix level) — live-adjustable without restarting the track. Quiz improvements: long words no longer truncate in the answer grid. Parenthetical hints that could reveal the answer are now automatically stripped from questions and options. User-adjustable text size now applies to grammar explanations, contrastive notes, and syntax hints.

NEW IN 1.1.0 Word Type Audio Identity Every word type now has its own sound signature. Nouns, verbs, adjectives, and 6 more types each play a distinct waveform and frequency — so you can hear the difference between a noun (sawtooth, 261 Hz) and a verb (square wave, 440 Hz). Word type badges on vocabulary cards show color, waveform glyph, and label at a glance. Live Oscilloscope A real-time oscilloscope now visualizes audio as animated waveforms — on vocabulary cards during speech playback and in the Syntax Sequencer during sentence replay. Watch the sound as you hear it. Syntax Sequencer Audio Feedback Placing and removing word blocks now triggers audio cues based on word type. Tap Play to hear your sentence as a synth sequence with synchronized visual highlighting. Correct sentences play consonant melodies, incorrect ones trigger dissonance. 2 New Ambient Tracks "Wellenreiter" — an ethereal, floating soundscape in G minor with ultra-slow filter sweeps and the softest waveform pairing (sine + triangle). "Nachtschicht" — a nocturnal groove in F# Dorian. The warm triangle pad and unique Dorian harmonics evoke late-night concentration under neon lights. 6 generative ambient tracks now available in Settings.