AutoPad vs SonoSpec
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AutoPad
Generate atmospheric drone sounds for live performances and recordings. Easily tap a key to create a subtle soundscape that plays continuously, with automatic crossfades between notes. Customize your sound with filters, reverb, and MIDI control.
- Generate atmospheric drone sounds
- Live and setlist performance modes
- Import custom pad sounds
- Adjust crossfade, filters, reverb, pan, volume
- Customizable metronome
- AUv3 plugin support
- Ableton Link for synchronization
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AutoPad is the easiest way to bring ambient pad loops into your mix! AutoPad generates atmospheric drone sounds that lend subtle structure to your live performances and recordings. Simply tap a key, and AutoPad will provide a tasteful soundscape that plays for as long as you like. Natural crossfades between keys are handled automatically. Features: - Perform with ease. AutoPad has two modes: Live mode gives you instant access to all twelve keys, and setlist mode lets you build a custom list of songs. - Set the mood. AutoPad comes with 10 carefully designed pad sounds. Each one creates a unique atmosphere in all 12 keys. - Expand your library. You can add to the factory sounds by importing your own pads or by purchasing one of the in-app sound packs.* - Shape your sound. AutoPad's menu gives you control over crossfade time, high-pass and low-pass filters, reverb amount, pan, and volume. - Easy on storage. AutoPad's seamlessly looped sample-based drones contain just what you need to provide a pleasing atmosphere and don't take up excessive space on your device. - Stay in sync. AutoPad features a customizable metronome with a dedicated pan control. Keep your band locked in without needing to lug around a tracks rig. - Deep MIDI Control. AutoPad's MIDI Actions menu makes it easy to customize how AutoPad responds to your MIDI controller. - Use with other apps. AutoPad comes with a fully-featured AUv3 plugin! Run AutoPad alongside other music apps in your favorite AUv3 host. - Now on the Mac. AutoPad runs on macOS! You can use AutoPad as a standalone app or as an AUv3 plug-in in a compatible host. Both Intel and M1 Macs supported. - Go Wireless. Ableton Link lets you stay in sync with other devices on the same Wi-Fi network. AutoPad also supports Bluetooth MIDI controllers and AirPlay audio. - Share with friends. Make sure your band is all on the same page by easily sharing setlists with AirDrop. - Stay organized. AutoPad lets you save and recall setlists with a simple setlist manager. - Looks great. AutoPad features a dark color scheme that is easy on the eyes and performs well on the stage. Note on use: AutoPad sounds great in a variety of contexts, but please make sure you understand the intended use before purchase. AutoPad's sounds are designed to be played softly and continuously behind live musicians. They include the root, fifth, and octave. As such, they can be used in a major or minor context. When using AutoPad in worship music, it is not necessary to change the pad with each chord change. For example, if you have a song in the key of E, you can play a pad in E for the duration of the song. * While files of any length can be imported into AutoPad, due to realtime memory restrictions, AutoPad loads a 3.5 minute subsection of files longer than four minutes. A short fade is applied to eliminate pops. See manual for details.
SonoSpec
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SonoSpec turns your iPhone or iPad microphone into a beautiful real-time audio spectrum analyzer. Built for car-audio tuning, room acoustics, HVAC and machinery noise hunting, speaker testing, and anyone who wants to SEE what they're hearing. FOUR VIEWS, ONE INSTRUMENT • Spectrum — live FFT trace with peak hold and a log-frequency grid • Waterfall — scrolling spectrogram that makes tones, sweeps and rattles obvious • Split — spectrum and waterfall together • Octave — 31-band 1/3-octave RTA bars MEASUREMENT-GRADE DETAILS • FFT sizes from 2,048 to 16,384 points (5.9 Hz resolution at 48 kHz) • A, C and Z weighting curves computed per the IEC 61672 formulas • Exact base-10 1/3-octave bands per the IEC 61260 definitions • Peak-hold trace with slow decay, pause/hold, and a drag cursor that reads out the exact frequency and level under your finger • Levels in dBFS with a proper full-scale sine reference and window-bandwidth (ENBW) correction — the numbers mean something BUILT-IN SIGNAL GENERATOR • Pink noise, white noise, sine, log sweep and warble tones — the source half of the RTA workflow • Feed the system under test by cable or USB and watch the response live TARGET CURVES • Overlay a house curve — flat, −3 dB/oct tilt, or a bass-lifted car target — on the live spectrum • Auto-fit positioning: the shape snaps to your measurement, no fiddling SNAPSHOTS & EXPORT • Freeze a measurement and recall it as a ghost overlay for before/after comparison • Share a publication-ready image or CSV with a full metadata header — FFT size, window, weighting — so your data still means something later TUNED TO FEEL LIKE HARDWARE Rendering runs on a dedicated Metal graphics path at the full analysis rate, with a phosphor-and-ember instrument look that's readable at arm's length. On iPad it fills the screen and adapts to Split View and Stage Manager windows. PRIVATE BY CONSTRUCTION Audio is analyzed on-device and never recorded, stored, or transmitted. SonoSpec has no accounts, no ads, no analytics — the app cannot even access the network. One-time purchase. No subscriptions.
Screenshots
Verdict
The clearest difference is in-app purchases: SonoSpec at none against AutoPad's 3. AutoPad's advantage is price ($6.99 vs $9.99) and chart position (#34 vs unranked). On update cadence and ads 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
AutoPad costs $6.99 and SonoSpec $9.99 up front. AutoPad sells 3 one-off in-app purchases. SonoSpec asks for nothing beyond the download.
AutoPad ships an update monthly, SonoSpec every 2 months. The most recent releases landed on November 6, 2026 and November 8, 2026 respectively.
| Parameter | AutoPad | SonoSpec |
|---|---|---|
| Price | $6.99 — better | $9.99 |
| Rating | 4.4 (174 ratings) — better | — |
| Positive reviews | 78.3% of reviews | — |
| Number of ratings | 174 — better | — |
| Update frequency | Monthly — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Best chart rank | #34 — better | — |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 28 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Ryan Robinson | Corey Thomas Slick |
Bugs and requests
AutoPad
Reported bugs
3 issues- Imported pads not working correctly
- Pad sounds not switching as expected
- Bluetooth connectivity issues
Requested features
5 requests- Ability to save individual song settings
- Option to choose audio output device
- Customizable pad layers and textures
- Octave/pitch shifting for pads
- Metronome on/off independent of pads
SonoSpec
Not enough reviews yet to summarise bugs or requests.
In-app purchases
AutoPad
- Bonus SoundsFree
- Shimmer Pads$4.99
- Grainscapes$4.99
SonoSpec
No in-app purchases









