2099 Techno vs Reverse Audio · Voice Changer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
2099 Techno
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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.
Reverse Audio · Voice Changer
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Have fun with your audio using Reverse Audio · Voice Changer. Reverse songs, recordings, and voice clips to hear them in a completely different way. Record your own voice, import audio from your device, try voice changes, and add sound effects to explore new ways to enjoy your audio. Whether you want to hear a familiar song backward or experiment with your own voice, everything is easy to access in one place. FEATURES - Reverse your audio and songs - Play voice recordings in reverse - Record your voice in the app - Import audio from your device - Change the voice in your recordings - Add fun effects to your audio REVERSE AUDIO Reverse your songs, recordings, and voice clips with ease. Play them backward and discover how familiar sounds change when you hear them in reverse. Try reversing singing, speech, music, or other audio clips and enjoy hearing them in a whole new way. RECORD AUDIO Record your voice or other sounds directly in the app. Capture a song, voice clip, funny recording, or quick audio whenever you want. Once recorded, you can reverse your audio or try different voice changes and effects. IMPORT AUDIO Choose an audio file from your device and bring it into the app. Use your saved songs, recordings, or sound clips to experiment with reverse playback, voice changes, and sound effects without having to record everything again. CHANGE VOICE Give your recordings a different sound with voice-changing options. Try different changes on your recorded audio and listen to how your voice sounds in new ways. It’s a simple way to experiment with your recordings and have some fun. SOUND EFFECTS Add fun effects to your recordings and imported audio. Try different sounds on your voice or other clips and hear how each effect changes the original audio. SAVED AUDIO Keep your recordings and edited audio in one place. Easily find your saved tracks whenever you want to play them again, organize your audio, or share your creations with others. Reverse your audio, hear your recordings backward, try different sounds, and have fun with your voice using Reverse Audio · Voice Changer. By using this app, you agree to our: Privacy Policy: https://sites.google.com/view/smartcoreapps/reverse-audio/privacy-policy Terms of Use: https://sites.google.com/view/smartcoreapps/reverse-audio/terms-of-use
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Verdict
The clearest difference is ads: 2099 Techno at none against Reverse Audio · Voice Changer's shown. 2099 Techno also leads on update cadence (every 3 days vs weekly) and iOS requirement (15.0 vs 17.0). On price, in-app purchases and device support 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. 2099 Techno sells 1 one-off in-app purchase and Reverse Audio · Voice Changer sells 1 in-app purchase, starting at $14.99 per 7 days. Whichever you choose, the download price is not the number that matters.
2099 Techno ships an update every 3 days, Reverse Audio · Voice Changer weekly. The most recent releases landed on October 8, 2026 and October 3, 2026 respectively.
| Parameter | 2099 Techno | Reverse Audio · Voice Changer |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 days — better | Weekly |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 15 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | Soft Brew Mobile | Smart Core Apps |
In-app purchases
2099 Techno
- AUv3 Unlock$2.99
Reverse Audio · Voice Changer
- Reverse Audio Weekly Premium3 Days trial$14.997 Days
Questions
Is 2099 Techno free?
Is Reverse Audio · Voice Changer free?
Do 2099 Techno or Reverse Audio · Voice Changer have ads?
Which is updated more often, 2099 Techno or Reverse Audio · Voice Changer?
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