# SpectraHold — 3D spectrogram with memory

> 3D spectrogram with memory (iPhone/iPad app by RAFAEL SILVA PFLEGER.)

- Source: https://appshunter.io/ios/app/spectrahold/id6815799172 (this page in markdown: same URL + `.md`)
- Developer: [RAFAEL SILVA PFLEGER](https://appshunter.io/developer/6815799174)
- Category: Utilities, Music
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.0 · 6 MB
- Languages: American English, Arabic, Bangla, French (France), German (Germany), Hindi, Indonesian, Japanese, European Portuguese, Russian and 3 more
- Released: 2026-10-09
- Data updated: 2026-10-15

## What is SpectraHold?

The spectrogram with memory.

SpectraHold turns microphone input into a 3D spectrogram. Watch frequencies in real time, freeze the view, and explore up to 120 seconds of visual history to inspect a detail you just heard.

FREEZE AND EXPLORE
Tap the graph to inspect a frequency. Zoom and browse the history, then return to live analysis whenever you want.

ADJUST THE VIEW
Choose a visible window from 1 to 20 seconds, color palettes, and automatic or manual visual gain from −40 to +40 dB. Visual gain changes the graph without changing microphone gain.

FEATURES
• Real-time 3D spectrogram from 20 Hz to 20 kHz.
• Adjustable history from 20 to 120 seconds.
• Frequency inspection, zoom, and history navigation.
• Up to two estimated peaks per region: bass, midrange, and treble. Detection does not confirm resonance.
• Background capture and capture with the screen locked, while permitted by the system.
• Compatible with iPhone and iPad.

Audio is processed on your device. History stays in memory; no audio file is saved or uploaded. Closing the app or a system interruption may stop capture.

TRIAL AND PURCHASE
Download for free. Activate a free 7-day trial to access all features. After the trial, analysis stops until you purchase full access. The unlock is a one-time purchase, with no subscription or automatic charge. The local price is shown before you confirm the purchase. You can restore purchases.

SpectraHold is a visual analysis tool. It does not apply equalization, automatically eliminate feedback, or replace a calibrated sound pressure level meter. Estimates depend on the microphone, device, and recording conditions.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| 7-day Trial | Free | one-time |
| Full Access | $5.99 | one-time |


## Is SpectraHold safe?

Not enough ratings yet to assess SpectraHold.

## Is SpectraHold legit?

SpectraHold has limited verification signals. The AppsHunter Legitimacy Score for SpectraHold is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 2 releases)

### 1.0.1 — 2026-10-12

English App Store description and screenshots. The app’s features and one-time unlock remain unchanged.

### 1.0.0 — 2026-10-09

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-15.*