SpellSynth vs dSL1200
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SpellSynth
This app recreates a classic 1978 spelling toy with four engaging game modes. It allows users to type any word or phrase and hear it spoken aloud using vintage synthesized voices. Explore different speech synthesis eras and even play the keypad with a MIDI keyboard.
- Type and hear any word spoken
- Four game modes (Free Play, Spell, Mystery Word, Say It)
- Three distinct vintage voice characters
- MIDI keyboard support
- Export audio to WAV
- Adjustable gap between words
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SpellSynth is a playable love-letter to the 1978 spelling toy that taught a generation to read — rebuilt for iPhone, iPad, and Mac, in English and French, with five modes, a crunchy VFD display, and three vintage voice characters across two decades of speech-synthesis history. Tap a letter and it speaks. Type ANY word — your name, this week's vocabulary list — and SpellSynth speaks it back. EVERY WORD SPEAKS The 500+ bundled words across 20+ themes use a hand-recorded retro voice. Anything else — a name, your kid's spelling list — falls back to the system engine through your chosen voice, cached so the second tap is instant. • FREE PLAY — type any word, a whole phrase, or a number and hear it spoken. Tap SPACE to build a sentence; it's read back word by word as the VFD cycles. Numbers ("2" becomes "two") and contractions ("don't") speak too. A GAP control tunes the pause between words (50–500 ms), and a RECENT row keeps this session. • SEQ — a 16-step sequencer that speaks a word per step, locked to your tempo. Type four words, get a robot vocal loop. Put a single letter on a step and it says the letter name on the beat instead. FIT stretches each word to fill its step, so words pitch up as the tempo climbs. • SPELL — SpellSynth says a word. You spell it. Three mistakes and you get the answer, then try a new one. HINT reveals a letter when you're stuck. • MYSTERY WORD — the classic hidden-word game. You get the category and first letter free; pick letters until it reveals itself. Six wrong guesses ends it. • SAY IT — listen-and-repeat practice. SpellSynth spells the word letter by letter, then says it whole. REPEAT to hear it again, NEXT for a new one. • SHARE — render any word or phrase to a WAV and send it to Files, AirDrop, or your DAW. EN FRANÇAIS Pick Français in Settings and SpellSynth speaks French: 360+ words, French game screens and an apostrophe key, after the 1981 French edition. The AUv3 speaks French too. THREE VINTAGE VOICES Pick a voice character in Settings. Each one draws from a different era of speech-synthesis history, applied to every word you hear: • 1968 ODYSSEY — calm, deep-baritone monotone with a deliberately slow cadence. Aesthetic homage to the late-60s sci-fi AI voices. • 1978 LPC — the original Speak & Spell character. A 10-pole LPC vocoder driven by the actual TMS5220 chirp ROM, the same speech algorithm Texas Instruments shipped in the toy. Buzzy, granular, unmistakable. • 1986 DECTALK STYLE — fixed-pitch impulse train through formants extracted from your input. Modelled on the Klatt-style synthesis that defined Hawking's iconic computer voice. Deliberate, monotone, emphatically computery. • DEFAULT — clean system speech, no extra processing, for when you just want clear pronunciation. PLAY WITH A MIDI KEYBOARD Connect a USB, Bluetooth, or Network MIDI keyboard and the keypad plays from real keys. MIDI notes 60–85 (C4–C#6) trigger letters A–Z. BUNDLED AUDIO UNIT (AUv3) SpellSynth ships an AUv3 instrument extension, so the same voice engine loads inside GarageBand, AUM, Loopy Pro, Cubasis, Logic Pro for iPad, and any AUv3 host on iPhone or iPad. Type a word and it speaks. Twenty-four parameters cover pitch, speed, bit-crush, sample-rate reduction, filter, envelope, LFO, stutter, the step sequencer, MIDI shaping, language, and voice character. Ten factory presets; all four voices play in your DAW. A serious MIDI surface for performers: sustain pedal (CC 64) for hold-and-release phrasing, Channel Pressure (aftertouch) routable to any parameter, three velocity curves (Soft / Linear / Hard), a pitch-bend range from ±0 to ±12 semitones, and 14 MIDI Learn targets covering every performance knob — bound CCs ride along with the preset. Stutter locks to the host tempo (1/4, 1/8, 1/16), and a Letter Map mode maps A–Z onto MIDI notes 60–85 so you can sequence spelling right in your DAW. Perfect for producers chasing that Kraftwerk / Stereolab / Broadcast sound.
dSL1200
This app simulates a professional DJ turntable, offering a realistic touch experience for scratching and beatmatching. It plays your music library and supports AUv3 effects for creative mixing.
- Real-time turntable emulation
- Touch-based scratching and control
- Plays DRM-free music library
- Loop playback for breaks
- AUv3 effect rack integration
- Realistic 3D tonearm and lighting
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dSL1200 — Digital SL-1200 A professional DJ turntable simulator and music player for iPhone — a faithful real-time emulation of the most-used direct-drive deck in DJ history. Every part of the deck modeled in 3D, most touch-controllable. THE DECK, REBORN For nearly fifty years, one direct-drive turntable has been the de-facto industry standard in clubs, hip-hop, dance, and bedroom studios across the world. dSL1200 captures that deck — its motor, its slipmat, its quartz-locked strobe, its long-throw pitch fader, its tonearm tracking — as a working real-time simulation, not a skin or a sample player. REAL TOUCH, REAL SCRATCH Touch the vinyl and the platter responds the way a real one does. The motor keeps spinning underneath while you scratch, the slipmat couples back when you let go, and the audio rate follows your finger through every back-cue, body-trick rub, and crab. QUARTZ-LOCKED STROBE The multi-dot rim ring locks at exactly 33⅓ and 45 RPM through honest motor-rate-driven strobe physics. Pitch off center and the dots drift; lock to nominal and they freeze — the same visual feedback DJs have used to beat-match by eye for half a century. ACCURATE PITCH RANGE Faithful to the original long-throw pitch fader, with ±8% range, a center-detent snap, and strobe drift independent of motor rate. Beat-match by eye exactly the way the deck was designed for. YOUR MUSIC, ON THE DECK Plays MP3, FLAC, WAV, AIFF, and Apple Lossless files from your iOS Music library — any DRM-free track you've imported, ripped, or purchased. (DRM-protected Apple Music subscription streams cannot be played.) The vinyl label is generated from each track's metadata, with title and artist printed on the LP. LOOP PLAY FOR BREAKS Toggle loop mode and the track wraps with zero-sample-gap continuity — perfect for chopping b-boy breaks, drum loops, and battle samples. Cue points and back-cues across the loop boundary work transparently. AUv3 EFFECT RACK Load any installed Audio Unit Extension into a wet/dry parallel mix. Reverb, delay, filters, EQ, distortion — any AUv3 plugin you have on the device works. 3D TONEARM Drag the arm to cue, tap the cue lever to lift and drop, and watch it sweep from outer rim to inner spindle in real time with the audio playhead. The anti-skating dial, height adjustment, and counterweight are visually modeled on the 3D deck for fidelity to the original (not user-adjustable in this version). AUTHENTIC LIGHTING The pop-up inspection lamp lifts and lights with a warm bulb when toggled. A red strobe LED throws a sharp glowing arc across the platter rim — the same flashing red light that makes a working deck look alive in low-light club environments. 120 Hz METAL RENDERER Native 120 Hz on ProMotion devices, 60 Hz everywhere else, with PBR lighting, real-time reflections, vinyl groove geometry, and adaptive touch-density compensation so scratching feels identical regardless of refresh rate. ENGINEERED FOR DETAIL - End-to-end touch-to-audio response under 6 ms - Adaptive high-resolution resampler tuned for scratching - Streaming + ring buffer for tracks of any length - Slipmat physics, not state-machine fakery dSL1200 is an independent simulation product. It is not affiliated with, endorsed by, or sponsored by any manufacturer of physical turntable hardware. Any visual or behavioral resemblance to professional DJ equipment is offered as faithful artistic homage to a category of product that has shaped DJ culture for decades.
Screenshots
Verdict
The clearest difference is review sentiment: dSL1200 at 100% against SpellSynth's 50%. dSL1200 also leads on rating (5.0 vs 3.2) and update cadence (every 3 days vs every 6 days). On price, ratings volume, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
SpellSynth costs $2.99 and dSL1200 $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
dSL1200 holds the better App Store score, 5.0 against 3.2. Both are backed by a comparable volume of ratings — 11 and 4 respectively. Written reviews point the same way: 50% of SpellSynth's written reviews are positive against 100% of dSL1200's.
SpellSynth ships an update every 6 days, dSL1200 every 3 days. The most recent releases landed on October 19, 2026 and October 13, 2026 respectively.
| Parameter | SpellSynth | dSL1200 |
|---|---|---|
| Price | $2.99 | $2.99 |
| Rating | 3.2 (11 ratings) | 5.0 (4 ratings) — better |
| Positive reviews | 50.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 11 — better | 4 |
| Update frequency | Every 6 days | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 112 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Chih Han Lin | Mike Wolak |
Customer experience
SpellSynth
dSL1200
In-app purchases
SpellSynth
No in-app purchases
dSL1200
No in-app purchases









