# ChargeSync vs Spectrum Analyzer

The clearest difference is in-app purchases: ChargeSync at none against Spectrum Analyzer's 2. ChargeSync also leads on iOS requirement (15.6 vs 17.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Spectrum Analyzer sells 2 in-app purchases, starting at $4.99 per 7 days. ChargeSync asks for nothing beyond the download.

ChargeSync ships an update every 3 weeks, Spectrum Analyzer monthly. The most recent releases landed on October 20, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | ChargeSync | Spectrum Analyzer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/spectrum-analyzer-audio-rta/id6781270627/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | — | Free with in-app purchases |
| Size | 57 MB | 21 MB |
| Requires iOS | **15.6** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ChargeSync Ltd](https://appshunter.io/developer/1560121497) | [brian koech](https://appshunter.io/developer/1853281007) |

## What reviewers say

### ChargeSync

[App page](https://appshunter.io/ios/app/chargesync/id6478061592)

**Features:** macOS Compatibility, Apple Wallet, Vision Pro support

**In-app purchases:** none


### Spectrum Analyzer

[App page](https://appshunter.io/ios/app/spectrum-analyzer-audio-rta/id6781270627)

Visualize sound frequencies, waveforms, and spectral activity in real-time using your device's microphone. Analyze audio for tuning, testing, music, or exploring ambient sounds with clear visual representations.

**Highlights:** Real-time audio spectrum analysis, FFT frequency analysis, Live spectrogram visualization, Audio waveform display, Frequency and amplitude monitoring, Microphone-based sound analysis

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| pro weekly | $4.99 | per 7 days |
| pro annual | $29.99 | per year |


## Frequently asked questions

### Is ChargeSync free?

ChargeSync is free to download, with no in-app purchases.

### Is Spectrum Analyzer free?

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

### Do ChargeSync or Spectrum Analyzer have ads?

Neither ChargeSync nor Spectrum Analyzer shows ads.

### Which is updated more often, ChargeSync or Spectrum Analyzer?

ChargeSync ships an update every 3 weeks, and Spectrum Analyzer monthly. Most recently, ChargeSync was updated on October 20, 2026 and Spectrum Analyzer on October 17, 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.*