# Buffers vs Wavelet Voice Sonogram

The clearest difference is price: Buffers at Free against Wavelet Voice Sonogram's $6.99. Buffers also leads on device support (3 vs 1) and iOS requirement (14.1 vs 26.2). On update cadence, ads and in-app purchases there is nothing between them.

Buffers is free to download; Wavelet Voice Sonogram costs $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Buffers ships an update every 13 months, Wavelet Voice Sonogram every 8 months. The most recent releases landed on October 31, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Buffers | Wavelet Voice Sonogram |
| --- | --- | --- |
| Price | **Free** | $6.99 |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 8 months** |
| Monetization | Free | — |
| Size | 0 MB | 0 MB |
| Requires iOS | **14.1** | 26.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Akkyra Systems](https://appshunter.io/developer/300710095) | [TOON,LLC](https://appshunter.io/developer/633948723) |

## What reviewers say

### Buffers

[App page](https://appshunter.io/ios/app/buffers/id306089755)

This tool helps design buffer solutions for pH control in research. It offers a calculator for accurate recipes and a reference for common buffering agents, supporting various parameters like pH, concentration, and temperature.

**Highlights:** 42 common buffering agents, Accurate recipe generation, Broad pH, concentration, temperature ranges, Detailed buffer system information, Shareable recipes (email, text, copy, print), Sophisticated calculation algorithm

**Features:** macOS Compatibility

**In-app purchases:** none


### Wavelet Voice Sonogram

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

**In-app purchases:** none


## Frequently asked questions

### Is Buffers free?

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

### Is Wavelet Voice Sonogram free?

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

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

Neither Buffers nor Wavelet Voice Sonogram shows ads.

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

Buffers ships an update every 13 months, and Wavelet Voice Sonogram every 8 months. Most recently, Buffers was updated on October 31, 2026 and Wavelet Voice Sonogram on November 7, 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.*