# CorrectAltitude vs ヤマチズ（旧 山と高原地図ホーダイ）

The clearest difference is price: ヤマチズ（旧 山と高原地図ホーダイ） at Free against CorrectAltitude's $0.99. ヤマチズ（旧 山と高原地図ホーダイ） also leads on update cadence (every 2 weeks vs every 8 months) and review sentiment (13% vs 0%). CorrectAltitude's advantage is in-app purchases (none vs 3) and iOS requirement (13.1 vs 15.1). On ads and device support there is nothing between them.

ヤマチズ（旧 山と高原地図ホーダイ） is free to download; CorrectAltitude costs $0.99 up front. ヤマチズ（旧 山と高原地図ホーダイ） sells 3 in-app purchases, starting at $4.49 per month. CorrectAltitude asks for nothing beyond the download.

CorrectAltitude ships an update every 8 months, ヤマチズ（旧 山と高原地図ホーダイ） every 2 weeks. Both last shipped on October 26, 2026.

## The numbers

| Metric | CorrectAltitude | ヤマチズ（旧 山と高原地図ホーダイ） |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Positive reviews | 0.0% of reviews | **13.5% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 2 weeks** |
| Monetization | **Paid** | Subscription |
| Size | 3 MB | 114 MB |
| Requires iOS | **13.1** | 15.1 |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [koji otani](https://appshunter.io/developer/503754671) | [Shobunsha Publications, Inc.](https://appshunter.io/developer/394338582) |

## What reviewers say

### CorrectAltitude

[App page](https://appshunter.io/ios/app/correctaltitude/id595948623)

Accurately determine your altitude using data from multiple GPS satellites. Capture photos with altitude and date stamps, and optionally display your named location for emergency use. Ideal for outdoor activities where precise elevation is crucial.

**Highlights:** Precise altitude determination, Altitude and date-stamped photos, Location display for emergencies, Continuous GPS triangulation, Adjustable accuracy range, Notify mode for altitude updates

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### ヤマチズ（旧 山と高原地図ホーダイ）

[App page](https://appshunter.io/ios/app/id1249187817)

Access detailed topographic maps for over 60 mountain areas, track your current location with GPS, and plan your hikes. Record your routes, save them, and even share them. Maps are available offline after downloading.

**Highlights:** Real-time GPS location tracking on maps, Offline map access for 63 mountain areas, Detailed hiking information from experts, Route recording and saving, Easy hike planning and itinerary creation, Digital access to supplementary guidebooks

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 定期購読月額チケット（旧プラン） | $4.49 | per month |
| 月額プラン | $4.49 | per month |
| 年割プラン | $41.99 | per year |


## Frequently asked questions

### Is CorrectAltitude free?

CorrectAltitude costs $0.99, with no in-app purchases.

### Is ヤマチズ（旧 山と高原地図ホーダイ） free?

ヤマチズ（旧 山と高原地図ホーダイ） is free to download, with in-app purchases available.

### Do CorrectAltitude or ヤマチズ（旧 山と高原地図ホーダイ） have ads?

Neither CorrectAltitude nor ヤマチズ（旧 山と高原地図ホーダイ） shows ads.

### Which is updated more often, CorrectAltitude or ヤマチズ（旧 山と高原地図ホーダイ）?

CorrectAltitude ships an update every 8 months, and ヤマチズ（旧 山と高原地図ホーダイ） every 2 weeks. Most recently, CorrectAltitude was updated on October 26, 2026 and ヤマチズ（旧 山と高原地図ホーダイ） on October 26, 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.*