Spectrolite vs UU
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Spectrolite
This app visualizes sound in real-time using various spectrogram types. Explore detailed audio data with intuitive touch controls and adjustable parameters. An optional purchase unlocks advanced measurement tools.
- Real-time spectrogram visualization
- Constant-Q, linear, and mel frequency scales
- Full human hearing frequency range
- Intuitive touch panning and zooming
- Adjustable gain, Q, and other parameters
- Pro version: grids, scales, spectrum view, tap-to-measure
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Spectrolite visualizes sound as spectrograms in real time. Spectrolite supports constant-Q spectrograms, which use a logarithmic frequency scale for a display where musical notes are evenly spaced. Spectrograms based on linear and mel frequency scales are also supported. The display covers the full frequency range of human hearing. Intuitive touch panning and zooming lets you dive in and explore the spectrograms in detail. Gain, Q, and other parameters can be adjusted in real time and instantly apply to the display of past signals as well as future ones. The Pro in-app purchase adds grids and scales for time, frequency, and amplitude, as well as a spectrum view and a tap-to-measure function. This expands Spectrolite into an audio measurement tool that you can use to measure frequencies, musical pitches, amplitudes, and durations.
UU
Easily create unique identifiers for your projects. This tool generates UUIDs on demand and can automatically copy them to your clipboard. It also features on-the-fly QR code generation and supports dark mode for a comfortable user experience.
- Generate UUID
- Auto-generate on launch
- Auto-copy to clipboard
- Generate QR code
- Dark Mode support
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This is the easiest UUID generator you'll ever use. Easily generate a UUID and add it to your clipboard so you can easily paste it anywhere else on your phone! The features include: - Generate UUID - Option to auto-generate UUID on launch - Option to auto-copy UUID on generate - Generates QR code on the fly! - Supports Dark Mode
Screenshots
Verdict
The clearest difference is price: Spectrolite at Free against UU's $0.99. Spectrolite also leads on ratings volume (66 vs 2) and update cadence (every 8 months vs every 21 months). UU's advantage is in-app purchases (none vs 1) and rating (5.0 vs 4.7). On ads, device support 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
Spectrolite is free to download; UU costs $0.99 up front. Spectrolite sells 1 one-off in-app purchase. UU asks for nothing beyond the download.
UU holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Spectrolite has 66 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 83% of Spectrolite's written reviews are positive against 100% of UU's.
Spectrolite ships an update every 8 months, UU every 21 months. The most recent releases landed on November 11, 2026 and November 3, 2026 respectively.
| Parameter | Spectrolite | UU |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 4.7 (66 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 83.3% of reviews | 100.0% of reviews — better |
| Number of ratings | 66 — better | 2 |
| Update frequency | Every 8 months — better | Every 21 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.6 | 14.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Waxing Wave | JP McGlone LLC |
Customer experience
Spectrolite
UU
In-app purchases
Spectrolite
- Pro$4.99
UU
No in-app purchases
