Piano Prober vs MOC
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Piano Prober
Read full descriptionHide full description
Does your piano go out of tune? Is your piano tuned fine? The App can answer these questions for free. Follow the on-screen prompts to strike several piano keys, you can obtain the piano's tuning curve as well as a chart of these keys' pitch deviations. By these results, you can evaluate how much your piano is out of tune. This App based on our leading piano tuner technology. It provide very high detection accuracy and reliability. Feature: Automatically generating the tuning curve to adapt to the unique characteristics of each piano. More than 0.1 cents accuracy of pitch measurement. Probing with not muting unison strings makes it more simple and convenient. Note: To achieve 0.1 cents measurement accuracy, you should mute unison strings well, and keep the environment quiet, no interference. With not muting unison mode, the measurement accuracy is about 2 cents.
MOC
Read full descriptionHide full description
应用内拥有大量的积木搭建图纸，以3D的方式展示积木的搭建过程； 蓝牙连接积木设备，通过虚拟遥控器来控制积木作品的不同操作功能，将用户的创意作品互动起来； 将简答的编程积木块应用到积木作品的控制和交互中，赋给用户基础的编程概念，培养用户的逻辑思维和解决问题的能力；
Screenshots
Verdict
Piano Prober and MOC are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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.
Piano Prober ships an update every 5 weeks, MOC every 2 months. The most recent releases landed on October 7, 2026 and October 10, 2026 respectively.
| Parameter | Piano Prober | MOC |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 | 12.0 |
| Further details — not scored | ||
| Size | 10 MB | 69 MB |
| Age rating | 4+ | 4+ |
| Developer | 绍军 初 | 福建佰育科技 |
In-app purchases
Piano Prober
No in-app purchases
MOC
No in-app purchases
