openTunes vs Tuner (チューナー)
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
openTunes
This app provides a guitar tuner for open-code tunings. Select a tuning, and the app displays the six strings with their corresponding sounds. You can choose from two guitar head styles and play sounds for 12 seconds by pressing letter name buttons.
- Open-code tuning selection
- Guitar head display
- Six-string sound visualization
- Two guitar head styles
- 12-second sound playback
- Letter name buttons
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This is a tuner for open-code tuning of a guitar. You choose an open-code on a memu, and push a tuning fork button. The head of a guitar appears and six sound is displayed. The head of a guitar has two kinds and you can change it. Letter names are buttons. If a button is pushed, sound will sound for 12 seconds.
Tuner (チューナー)
This app provides a highly accurate chromatic tuner. It allows you to set a reference tone A4 between 400Hz and 480Hz in 1Hz increments. You can also generate test tones across a wide range of notes.
- High-precision chromatic tuning
- Adjustable reference tone (400Hz-480Hz)
- Test tone generation (C0-B8)
- Wide note range support
- 1Hz increment tuning
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高精度なクロマチックチューナーアプリです。 基準音 A4 を 400Hz 〜 480Hz で 1Hz 単位で設定できます。 C0 〜 B8 の広い音程でサイン波のテスト音を鳴らすことができます。 【注意】 耳を痛めないように、音量を上げないでテスト音を鳴らしてください。 特に B2 以下の低い音は聞こえなくても、物理的に音としては出ているので音量を上げて耳を痛めないように気をつけてください。 C6 以上の高い音も、同様です（高い音は気づくと思いますが）。
Screenshots
Verdict
The clearest difference is review sentiment: openTunes at 100% against Tuner (チューナー)'s 40%. openTunes also leads on update cadence (every 2 months vs every 123 months) and iOS requirement (7.0 vs 26.0). On price, ads, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
openTunes ships an update every 2 months, Tuner (チューナー) every 123 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.
| Parameter | openTunes | Tuner (チューナー) |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.0 (1 ratings) — better |
| Positive reviews | 100.0% of reviews — better | 40.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 2 months — better | Every 123 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 7.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 58 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | HAOKA-KIKAKU | feb19 |
Customer experience
openTunes
Tuner (チューナー)
In-app purchases
openTunes
No in-app purchases
Tuner (チューナー)
No in-app purchases
