# SUS4 Time Trainer vs JTL五線譜小學堂 遊戲互動學習 視譜 絕對音感 節奏感訓練

The clearest difference is in-app purchases: JTL五線譜小學堂 遊戲互動學習 視譜 絕對音感 節奏感訓練 at none against SUS4 Time Trainer's 11. JTL五線譜小學堂 遊戲互動學習 視譜 絕對音感 節奏感訓練 also leads on iOS requirement (13.0 vs 16.0). SUS4 Time Trainer's advantage is ads (none vs shown) and update cadence (every 2 weeks vs every 2 months). On price and device support there is nothing between them.

Both are free to download. SUS4 Time Trainer sells 11 in-app purchases, starting at $0.99 per month. JTL五線譜小學堂 遊戲互動學習 視譜 絕對音感 節奏感訓練 asks for nothing beyond the download.

SUS4 Time Trainer ships an update every 2 weeks, JTL五線譜小學堂 遊戲互動學習 視譜 絕對音感 節奏感訓練 every 2 months. The most recent releases landed on October 31, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | SUS4 Time Trainer | JTL五線譜小學堂 遊戲互動學習 視譜 絕對音感 節奏感訓練 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Size | 29 MB | 61 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | **iPhone, iPad, Mac, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ThePaulSmith](https://appshunter.io/developer/319584506) | [Shan-Chun Hu](https://appshunter.io/developer/6773007974) |

## What reviewers say

### SUS4 Time Trainer

[App page](https://appshunter.io/ios/app/sus4-time-trainer-rhythm/id6777230104)

**Features:** Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SUS4 Time Trainer Pro Monthly | $0.99 | per month |
| SUS4 All-Access | $4.39 | per month |
| SUS4 All-Access | $5.99 | per month |
| SUS4 All-Access | $7.99 | per month |
| SUS4 All-Access Annual | $19.99 | per year |
| SUS4 All-Access Annual | $26.99 | per year |
| SUS4 All-Access Annual | $35.99 | per year |
| SUS4 All-Access Annual | $51.99 | per year |
| SUS4 Time Trainer Lifetime | $54.99 | one-time |
| SUS4 Time Trainer Lifetime | $71.99 | one-time |
| SUS4 Time Trainer Lifetime | $103.99 | one-time |


### JTL五線譜小學堂 遊戲互動學習 視譜 絕對音感 節奏感訓練

[App page](https://appshunter.io/ios/app/jtl/id6780224080)

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

**In-app purchases:** none


## Frequently asked questions

### Is SUS4 Time Trainer free?

SUS4 Time Trainer is free to download, with in-app purchases available.

### Is JTL五線譜小學堂 遊戲互動學習 視譜 絕對音感 節奏感訓練 free?

JTL五線譜小學堂 遊戲互動學習 視譜 絕對音感 節奏感訓練 is free to download, with no in-app purchases.

### Do SUS4 Time Trainer or JTL五線譜小學堂 遊戲互動學習 視譜 絕對音感 節奏感訓練 have ads?

JTL五線譜小學堂 遊戲互動學習 視譜 絕對音感 節奏感訓練 shows ads; SUS4 Time Trainer does not.

### Which is updated more often, SUS4 Time Trainer or JTL五線譜小學堂 遊戲互動學習 視譜 絕對音感 節奏感訓練?

SUS4 Time Trainer ships an update every 2 weeks, and JTL五線譜小學堂 遊戲互動學習 視譜 絕對音感 節奏感訓練 every 2 months. Most recently, SUS4 Time Trainer was updated on October 31, 2026 and JTL五線譜小學堂 遊戲互動學習 視譜 絕對音感 節奏感訓練 on October 28, 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.*