# 天文ガイド vs ぐるぐる ZEISS IX型

The clearest difference is in-app purchases: ぐるぐる ZEISS IX型 at none against 天文ガイド's 10. ぐるぐる ZEISS IX型 also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. 天文ガイド sells 10 in-app purchases, starting at $6.99 per month. ぐるぐる ZEISS IX型 asks for nothing beyond the download.

天文ガイド ships an update every 14 months, ぐるぐる ZEISS IX型 every 17 months. The most recent releases landed on November 6, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | 天文ガイド | ぐるぐる ZEISS IX型 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 20.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 14 months** | Every 17 months |
| Size | 41 MB | 206 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Seibundo Shinkosha Publishing Co., Ltd.](https://appshunter.io/developer/513602721) | [IMAGE FACTORY CO., LTD.](https://appshunter.io/developer/882653089) |

## What reviewers say

### 天文ガイド

[App page](https://appshunter.io/ios/app/id987344209)

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 天文ガイド | $6.99 | per month |
| 天文ガイド | $39.99 | per 6 months |
| 天文ガイド | $79.99 | per year |
| 天文ガイド2016年11月号 | $5.99 | one-time |
| 天文ガイド2016年12月号 | $5.99 | one-time |
| 天文ガイド2019年2月号 | $5.99 | one-time |
| 天文ガイド2019年4月号 | $5.99 | one-time |
| 天文ガイド2019年10月号 | $5.99 | one-time |
| tenmonguide202611 | $6.99 | one-time |
| tenmonguide202610 | $6.99 | one-time |


### ぐるぐる ZEISS IX型

[App page](https://appshunter.io/ios/app/zeiss-ix/id6450916756)

**In-app purchases:** none


## Frequently asked questions

### Is 天文ガイド free?

天文ガイド is free to download, with in-app purchases available.

### Is ぐるぐる ZEISS IX型 free?

ぐるぐる ZEISS IX型 is free to download, with no in-app purchases.

### Do 天文ガイド or ぐるぐる ZEISS IX型 have ads?

天文ガイド shows ads; ぐるぐる ZEISS IX型 does not.

### Which is updated more often, 天文ガイド or ぐるぐる ZEISS IX型?

天文ガイド ships an update every 14 months, and ぐるぐる ZEISS IX型 every 17 months. Most recently, 天文ガイド was updated on November 6, 2026 and ぐるぐる ZEISS IX型 on November 7, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*