# Twelve vs 古筝调音器

The clearest difference is in-app purchases: Twelve at none against 古筝调音器's 11. Twelve also leads on review sentiment (100% vs 86%). 古筝调音器's advantage is ads (none vs shown) and update cadence (fortnightly vs every 5 months). On price, rating, ratings volume and device support there is nothing between them.

Both are free to download. 古筝调音器 sells 11 one-off in-app purchases. Twelve asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Twelve against 5.0 for 古筝调音器. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews are what separate them: 100% of Twelve's written reviews are positive against 86% of 古筝调音器's.

Twelve ships an update every 5 months, 古筝调音器 fortnightly. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Twelve | 古筝调音器 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/twelve-tone-tuner/id1448477362/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/id6479046762/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | **100.0% of reviews** | 85.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Fortnightly** |
| Monetization | Ad-supported | **Free** |
| Size | 26 MB | 42 MB |
| Requires iOS | 26.0 | **13.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [小军 王](https://appshunter.io/developer/1343888593) | [鑫磊 张](https://appshunter.io/developer/1051215758) |

## What reviewers say

### Twelve

[App page](https://appshunter.io/ios/app/twelve-tone-tuner/id1448477362)

A professional vocal and instrument tuning application. It offers interfaces for various instruments and supports tuner and sound modes with fine-tuning capabilities.

**Highlights:** Vocal tuning, Instrument tuning (guitar, violin, bass, ukulele, erhu), Tuner mode, Sound mode, A4 frequency fine-tuning

**Features:** Vision Pro support

**In-app purchases:** none


### 古筝调音器

[App page](https://appshunter.io/ios/app/id6479046762)

This app provides professional tuning, metronome, and instructional videos for the guzheng. It offers precise pitch recognition and automatic tuning, catering to both beginners and experienced players. Optimize your practice with specialized tuning for various techniques.

**Highlights:** Professional guzheng tuning, Automatic and manual tuning modes, Specialized tuning for techniques, Built-in metronome, Guzheng instructional videos, Real guzheng sound samples

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

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 高山流水(五级) | $3.99 | one-time |
| 浏阳河(四级) | $3.99 | one-time |
| 小小竹排(四级) | $3.99 | one-time |
| 渔舟唱晚(四级) | $3.99 | one-time |
| 洞庭新歌(五级) | $3.99 | one-time |
| 井冈山上太阳红(九级) | $5.99 | one-time |
| 战台风(七级) | $5.99 | one-time |
| 幸福渠水到俺村(十级) | $5.99 | one-time |
| 雪山春晓(八级) | $5.99 | one-time |
| 古筝调音器VIP | $5.99 | one-time |
| 茉莉芬芳(十级) | $5.99 | one-time |


## Frequently asked questions

### Is Twelve free?

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

### Is 古筝调音器 free?

古筝调音器 is free to download, with in-app purchases available.

### Which has better reviews, Twelve or 古筝调音器?

Twelve and 古筝调音器 are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Twelve or 古筝调音器 have ads?

Twelve shows ads; 古筝调音器 does not.

### Which is updated more often, Twelve or 古筝调音器?

Twelve ships an update every 5 months, and 古筝调音器 fortnightly. Most recently, Twelve was updated on October 29, 2026 and 古筝调音器 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.*