# Wavelet Voice Sonogram vs WispPGP

The clearest difference is update cadence: WispPGP at every 2 weeks against Wavelet Voice Sonogram's every 8 months. WispPGP also leads on price ($3.99 vs $6.99) and iOS requirement (16.0 vs 26.2). On ads, in-app purchases and device support there is nothing between them.

Wavelet Voice Sonogram costs $6.99 and WispPGP $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Wavelet Voice Sonogram ships an update every 8 months, WispPGP every 2 weeks. The most recent releases landed on October 12, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Wavelet Voice Sonogram | WispPGP |
| --- | --- | --- |
| Price | $6.99 | **$3.99** |
| Rating | — | **[4.3 (3 ratings)](https://appshunter.io/ios/app/wisppgp/id6757249850/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 75.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 2 weeks** |
| Monetization | — | Paid |
| Size | 0 MB | 17 MB |
| Requires iOS | 26.2 | **16.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [TOON,LLC](https://appshunter.io/developer/633948723) | [Marco Janssen](https://appshunter.io/developer/787863348) |

## What reviewers say

### Wavelet Voice Sonogram

[App page](https://appshunter.io/ios/app/wavelet-voice-sonogram/id1574131130)

**In-app purchases:** none


### WispPGP

[App page](https://appshunter.io/ios/app/wisppgp/id6757249850)

This app provides a focused toolkit for encrypting, decrypting, signing, and verifying text using OpenPGP standards. It allows for managing multiple key pairs and integrates with other apps via a share extension for secure communication.

**Highlights:** Encrypt and decrypt messages, Sign and verify messages, Generate and manage multiple key pairs, Set an active key, Share encrypted output as text or files, Use Share Extension for any app

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

**In-app purchases:** none


## Frequently asked questions

### Is Wavelet Voice Sonogram free?

Wavelet Voice Sonogram costs $6.99, with no in-app purchases.

### Is WispPGP free?

WispPGP costs $3.99, with no in-app purchases.

### Do Wavelet Voice Sonogram or WispPGP have ads?

Neither Wavelet Voice Sonogram nor WispPGP shows ads.

### Which is updated more often, Wavelet Voice Sonogram or WispPGP?

Wavelet Voice Sonogram ships an update every 8 months, and WispPGP every 2 weeks. Most recently, Wavelet Voice Sonogram was updated on October 12, 2026 and WispPGP on October 10, 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.*