# SoHO Viewer vs 标日AI课堂：初下

The clearest difference is in-app purchases: SoHO Viewer at none against 标日AI课堂：初下's 1. SoHO Viewer also leads on ads (none vs shown). 标日AI课堂：初下's advantage is update cadence (every 9 days vs every 2 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. 标日AI课堂：初下 sells 1 one-off in-app purchase. SoHO Viewer asks for nothing beyond the download.

SoHO Viewer ships an update every 2 months, 标日AI课堂：初下 every 9 days. The most recent releases landed on July 21, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | SoHO Viewer | 标日AI课堂：初下 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.4 (19 ratings)](https://appshunter.io/ios/app/soho-viewer/id356679615/reviews)** | — |
| Number of ratings | **19** | — |
| Positive reviews | 69.1% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 9 days** |
| Monetization | Free | — |
| Size | 5 MB | 48 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jerome Diaz](https://appshunter.io/developer/334987620) | [盖粦 徐](https://appshunter.io/developer/1724030910) |

## What reviewers say

### SoHO Viewer

[App page](https://appshunter.io/ios/app/soho-viewer/id356679615)

Access and view the latest images from the Solar and Heliospheric Observatory (SoHO). Receive push notifications when new images are available, keeping you updated on solar activity. This app is a convenient tool for anyone interested in space imagery.

**Highlights:** Download latest SoHO images, Display solar images, Push notifications for new images, Badge notification for new images, Image courtesy of SOHO consortium

**Features:** macOS Compatibility

**In-app purchases:** none


### 标日AI课堂：初下

[App page](https://appshunter.io/ios/app/ai/id6737880430)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 标日AI课堂：初下永久会员 | $2.99 | one-time |


## Frequently asked questions

### Is SoHO Viewer free?

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

### Is 标日AI课堂：初下 free?

标日AI课堂：初下 is free to download, with in-app purchases available.

### Do SoHO Viewer or 标日AI课堂：初下 have ads?

标日AI课堂：初下 shows ads; SoHO Viewer does not.

### Which is updated more often, SoHO Viewer or 标日AI课堂：初下?

SoHO Viewer ships an update every 2 months, and 标日AI课堂：初下 every 9 days. Most recently, SoHO Viewer was updated on July 21, 2026 and 标日AI课堂：初下 on September 10, 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.*