Cadenza vs DLD

Cadenza teaches Morse code the way real operators actually read it: by ear. You start with just two letters at full speed and add more as you go, so you learn the sound and rhythm of each character instead of counting dots and dashes. Built on the proven Koch method with Farnsworth spacing, Cadenza adapts to you. It notices which characters you confuse, drills the exact pairs you mix up, and raises your speed only when you are ready. WHAT YOU GET - Letters trainer: the full alphabet, numbers and punctuation, one character at a time - Reference: tap any letter, prosign, Q-code or abbreviation to hear it - Tools: Listen, a decoder that turns clean Morse tones into text through your mic, a two-way Morse code translator (text to Morse and back, played as sound, screen light, camera flash or vibration) and an accessible Morse keyboard - Postcard: turn a short message into a Morse card, drawn as a rhythm score and sent as a picture with a link. Your friend hears it and decodes it in Cadenza - Progress: streaks, a daily goal, achievements, accuracy heatmaps and a daily challenge that is the same for everyone - Three channels: hear it, see it (a gentle beacon or your camera flash), feel it through vibration GO FURTHER WITH PRO - Copy whole words, random groups and full lines of text - Your lists: drill your own words, callsigns and contest exchanges; the QSO simulator answers your own callsign - Head copy with no typing - Sending practice with an on-screen key, or plug in your own straight key or paddle through a USB or Bluetooth adapter (VBand, Vail); Cadenza does the iambic keying - Realistic on-air modes: callsign trainer, QSO simulator and pile-up - Detailed analytics: confusion matrix and reaction time WHY CADENZA No accounts. No ads. No tracking. Everything works offline and your practice stays on your device. Where other trainers make you count or stare at charts, Cadenza keeps you listening. PERFECT FOR - Total beginners learning from zero - Aspiring and licensed ham radio operators preparing for on-air CW - Anyone who wants a durable, offline skill Free forever: the full Koch trainer, the reference, the tools, the daily challenge and basic stats. Cadenza Pro unlocks the copy, sending and on-air modes plus advanced analytics with a monthly or yearly subscription, or a one-time lifetime purchase. Cadenza Pro is offered as a monthly or annual auto-renewing subscription or a one-time lifetime purchase. Subscriptions are billed to your Apple ID and renew automatically unless cancelled at least 24 hours before the period ends. Manage or cancel in your Account Settings. Privacy Policy: https://morse-trainer.app/privacy Terms of Use: https://morse-trainer.app/terms

DLD is a digital logic design and circuits workbench for your phone. Drop gates onto the bench, wire them together, flip a switch, and watch the signal travel through the circuit in real time. Built for students working through a digital logic design course — and for anyone who wants to see Boolean algebra actually do something. BUILD ANYTHING • 28 components: switches, clocks, Vcc and ground, every standard gate, tri-state buffers, multiplexers, flip-flops, displays and probes • Gates take 2 to 8 inputs — one wide NAND instead of three cascaded ones • Tap a component to reach its settings: input count, clock speed, colour • A work bench far bigger than the screen, with pan, zoom and fit-to-circuit SEE IT WORKING • Current animates along every live wire, so you can follow a signal • LEDs, LED bars, 7-segment and hex displays light up as the circuit runs • A school bell that rings for as long as it has current • Logic probes read out 1 or 0 anywhere you wire one UNDERSTAND IT • Boolean equations written out from whatever you have drawn • A full truth table generated from your circuit, ready to copy out • Conflicting drivers on a net are flagged rather than quietly wrong • A tutorial section covering every gate symbol and its truth table KEEP YOUR WORK • Save and reopen as many circuits as you like • Undo and redo everything • Recolour wires, lamps and blocks however you want to read them COMPONENTS Switch · Clock · Vcc · GND · AND · OR · NOT · NAND · NOR · XOR · XNOR · Buffer · Tri-state buffer · Tri-state NOT · MUX · DEMUX · D flip-flop · T flip-flop · JK flip-flop · Virtual links · LED · LED bar · 7-segment · Hex display · Bell · Probe · Label PRIVATE BY DEFAULT No account. No sign-in. No analytics. No ads. Nothing leaves your device — your circuits are saved on the phone and nowhere else. The app works with no network connection at all.