# Phakchi vs Wavelet Voice Sonogram

The clearest difference is price: Phakchi at $2.99 against Wavelet Voice Sonogram's $6.99. Phakchi also leads on device support (3 vs 1) and iOS requirement (15.6 vs 26.2). On update cadence, ads and in-app purchases there is nothing between them.

Phakchi costs $2.99 and Wavelet Voice Sonogram $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Phakchi ships an update every 5 months, Wavelet Voice Sonogram every 8 months. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Phakchi | Wavelet Voice Sonogram |
| --- | --- | --- |
| Price | **$2.99** | $6.99 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 8 months |
| Monetization | Paid | — |
| Size | 2 MB | 0 MB |
| Requires iOS | **15.6** | 26.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Takayuki Imai](https://appshunter.io/developer/998239550) | [TOON,LLC](https://appshunter.io/developer/633948723) |

## What reviewers say

### Phakchi

[App page](https://appshunter.io/ios/app/phakchi-thai-keyboard/id1094097577)

This keyboard app offers an optimized layout for typing Thai on iPhones, addressing the small key size of standard keyboards. It features a familiar arrangement, color-coded keys, and options for learners.

**Highlights:** Optimized 6x8 key layout for iPhone, Familiar key arrangement, Color-coded keys for easy identification, Dictionary-order layout option for learners, One-handed typing support, Six input modes

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

**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 Phakchi free?

Phakchi costs $2.99, with no in-app purchases.

### Is Wavelet Voice Sonogram free?

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

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

Neither Phakchi nor Wavelet Voice Sonogram shows ads.

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

Phakchi ships an update every 5 months, and Wavelet Voice Sonogram every 8 months. Most recently, Phakchi was updated on October 29, 2026 and Wavelet Voice Sonogram on October 25, 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.*