# Spectrolite vs G.T.F.O.

The clearest difference is update cadence: G.T.F.O. at fortnightly against Spectrolite's every 8 months. Spectrolite's advantage is device support (3 vs 1) and iOS requirement (15.6 vs 18.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Spectrolite sells 1 one-off in-app purchase and G.T.F.O. sells 5 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Spectrolite ships an update every 8 months, G.T.F.O. fortnightly. The most recent releases landed on October 25, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Spectrolite | G.T.F.O. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (64 ratings)](https://appshunter.io/ios/app/spectrolite/id1480240180/reviews)** | — |
| Number of ratings | **64** | — |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Fortnightly** |
| Monetization | Free with in-app purchases | — |
| Size | 1 MB | 77 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Waxing Wave](https://appshunter.io/developer/392942046) | [Daisydoor](https://appshunter.io/developer/1755831368) |

## What reviewers say

### Spectrolite

[App page](https://appshunter.io/ios/app/spectrolite/id1480240180)

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.

**Highlights:** 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

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $4.99 | one-time |


### G.T.F.O.

[App page](https://appshunter.io/ios/app/gtfo/id6602902775)

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All Access | $0.99 | per 7 days |
| All Access | $1.99 | per 7 days |
| All Access | $9.99 | per year |
| All Access | $19.99 | per year |
| All Access | $39.99 | per year |


## Frequently asked questions

### Is Spectrolite free?

Spectrolite is free to download, with in-app purchases available.

### Is G.T.F.O. free?

G.T.F.O. is free to download, with in-app purchases available.

### Do Spectrolite or G.T.F.O. have ads?

Neither Spectrolite nor G.T.F.O. shows ads.

### Which is updated more often, Spectrolite or G.T.F.O.?

Spectrolite ships an update every 8 months, and G.T.F.O. fortnightly. Most recently, Spectrolite was updated on October 25, 2026 and G.T.F.O. on October 8, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*