SpolaSong vs 2099 Techno
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SpolaSong
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SpolaSong turns your iPhone or iPad into a stage keyboard: 55 real sounds inside the app — pianos, organs, strings, choir, pads, woodwinds, brass, guitars, basses and world instruments — ready to play, even with no internet. TRY IT FREE Play as much as you like for 30 minutes. The clock only runs while you play. Like it? Unlock everything with a single purchase: no subscription and no ads. OPEN AND PLAY The keyboard opens on screen ready to play. Change octave with one tap, make the keys bigger or smaller, and jump back to the keyboard from anywhere in the app. NEW: WORLD INSTRUMENTS Sitar, shehnai, pan flute, kalimba, steel drums and shamisen, plus accordion and harmonica, in their own category. LAYER UP TO 4 SOUNDS Piano and strings on the same key, or bass in the left hand and piano in the right. There are 19 ready-made combinations: one tap and you are set. FOR CHURCH, BAND AND STAGE Build your songs in sections (intro, verse, chorus) and switch every sound at once during the performance. Stage Mode shows song name, key, tempo and lyrics in large type. There is also a background pad in the song's key, a metronome, transpose, tuning and backing tracks. RECORD AND LISTEN Record what you played, listen right away, delete what you don't like and share the file. A REAL MIDI KEYBOARD, TOO Connect a MIDI keyboard over USB or Bluetooth and play with the touch of your hands and a sustain pedal. With MIDI Learn, your keyboard's buttons switch songs and sections. INSIDE GARAGEBAND SpolaSong is also an Audio Unit (AUv3) instrument, free, for use inside GarageBand and other compatible apps. YOUR OWN SOUNDS Import your own sound banks and use them in the same songs and sections. In English, Portuguese, Spanish, German, French, Japanese, Korean and Indonesian.
2099 Techno
This app generates unique electronic music tracks using chaotic mathematical principles. It offers multiple styles, virtual analog synthesis, and drum machines, with options for live play and MIDI export. All features are available for free.
- Generative track creation
- Virtual analog synth engine
- 909-style drum machine
- Chaos-driven melody and rhythm
- 8 distinct musical styles
- Live play and MIDI export
- Audio Unit integration
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2099 Techno writes complete tracks. Press generate and you get 76 bars with an intro, builds, two main sections, a breakdown and an outro, played by a virtual-analog engine and a 909-style drum machine. Bass, acid, stabs, pad, a lead line and the kit, through a dub delay, chorus and reverb. Nothing is sampled. Every note is made on the fly and no two tracks come out the same. The music comes from chaos maths. Three Lorenz attractors shape the melody, the rhythm and the mood. Three separate logistic maps run underneath the drums, the bass and the acid line, so they wander independently: turn the logistic control down and the hats and perc repeat every bar, turn it up and they never do. Chaos on its own is noise, so a small model filters it. It gets rewarded for consonant intervals and rehearses two hundred notes over the changes before it writes anything. The CHAOS / TASTE slider decides how much say each one gets. Eight styles, and they are properly different. Detroit rolls an off-beat bass under syncopated stabs. Dub Techno holds one chord for four bars and lets the delay do the work. Acid runs a 303 line with slides and accents. Hard pushes past 140 with a Reese bass and the drive up. Minimal takes most of it away. Every track is built from its seed. Write the seed down and you can have that exact track again, note for note, whenever you want it. You can play over it, too. The pads are the notes of the track's key rather than a piano keyboard, so nothing you touch is wrong, and the sixteen-step lane runs in time with the track and follows your host. Both play any part you like: bass, acid, stabs, pad or lead, through that part's sound and out on its MIDI channel. Choose which sections the lane plays in - just the breakdown, say - and preview it on its own without starting the track. Turn on RADIO and it keeps playing, picking a new key, mode, style, sound kit and tempo for each track. You also get: • 8 styles, 6 dark modes, 12 keys, tempo and density • Two-oscillator analog voice with sub, noise, resonant filter and glide • 22 presets and 9 sound kits, from Warehouse to Game Boy, plus random patch • Six-part mixer, dub delay, chorus, plate reverb and a global sweep filter • A PLAY panel: pads in the track's own key, and a 16-step lane with accent and slide, running in time with the track and only in the sections you pick • MIDI in, so your keyboard plays whichever part you have selected • MIDI export: six tracks, one per part • Live spectrum, waveform and a view of the chaos engine at work Two Audio Units, an instrument and a MIDI processor. Each part sends on its own MIDI channel, drums on 10, so one instance can drive six instruments. The MIDI version passes your keyboard through instead of swallowing it. Both follow your host's tempo and transport. One install registers both. The app is free and nothing in it is held back. Using the Audio Units inside other apps is a one-time purchase, and each AUv3 session plays for two minutes first so you can try them properly.
Screenshots
Verdict
The clearest difference is update cadence: SpolaSong at every 3 days against 2099 Techno's every 2 weeks. 2099 Techno's advantage is device support (4 vs 2). On price, ads, in-app purchases and iOS requirement 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
Both are free to download. SpolaSong sells 1 one-off in-app purchase and 2099 Techno sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
SpolaSong ships an update every 3 days, 2099 Techno every 2 weeks. The most recent releases landed on November 13, 2026 and November 10, 2026 respectively.
| Parameter | SpolaSong | 2099 Techno |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (2 ratings) — better |
| Number of ratings | — | 2 — better |
| Update frequency | Every 3 days — better | Every 2 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 16.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 394 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | R.R. PROCESSAMENTO DE DADOS E SERVIÇOS SS LTDA | Soft Brew Mobile |
In-app purchases
SpolaSong
- SpolaSong Full Unlock$14.99
2099 Techno
- AUv3 Unlock$2.99








