Spectre vs Drum Rack
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Spectre
This audio analysis utility provides real-time FFT and oscilloscope views for sound input. Customize waveform display, control sample rates, and zoom in for detailed analysis on iOS devices.
- FFT Analysis
- Oscilloscope
- Customizable Waveform
- Linear & Logarithmic Forms
- Pause/Play Controls
- Zoom Functionality
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Spectre is an iOS audio analysis utility designed to be useful and visually appealing, making use of retina displays. Feature Highlights: • FFT(Fast Fourier Transform) Analysis • Oscilloscope • Customizable Features: Wave Amplitude, Sample/Time Control, Line Width • Linear & Logarithmic Wave Forms • Pause/Play Controls • Zoom in/out on the Waveform! • Optimized for iPhone 3,4,5 and iOS 7 Currently this app takes input from standard input, and external mics. Cross-app sound analysis coming soon! Waveform recording also coming soon!
Drum Rack
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Drum Rack builds every drum sound from scratch. No samples anywhere — the kick, snare, hat and clap are synthesised as you play them, which is why a kick can drop from 200 Hz to 49 Hz along a curve you draw with your finger. WHAT IT DOES Four synthesised voices, each with its own controls. Draw the pitch envelope of the kick and the snare by hand: drag a point, add a point, bend the curve between two points. Watch the rendered waveform change as you go. A 32-step sequencer with per-step velocity, timing nudge and ratchets, so a single step can hold a roll of up to eight hits. Time signatures from 3/4 to 7/4, grids from 1/8 to 1/32 including triplets. Eighteen genre presets, from house and techno to jungle, boom bap and reggaeton. Each one loads a full kit and a pattern to start from. Export a loop as a WAV file, or the pattern as MIDI. The MIDI carries velocity, nudge, ratchets and time signature, and lands on the General MIDI drum map — drop it on a drum rack in your own DAW and it plays on your own kit. WHAT IT DOES NOT DO No account. No sign-in. No advertising. No analytics. No tracking. Your patterns stay on your device. Nothing is uploaded. FROM THE LAB Drum Rack is part of Lumlux Art Lab, a set of free browser tools for people who make music. The same drum machine runs on the website, so you can try it before installing anything. Made in Antwerp by FDR-Sound.
Screenshots
Verdict
The clearest difference is price: Drum Rack at Free against Spectre's $0.99. Spectre's advantage is iOS requirement (12.0 vs 15.0). On ads, 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
Drum Rack is free to download; Spectre costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Spectre | Drum Rack |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 3.0 (2 ratings) — better | — |
| Positive reviews | 40.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 96 months | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 46 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | Michael Hand | Frank De Rop |
In-app purchases
Spectre
No in-app purchases
Drum Rack
No in-app purchases









