# CorrectAltitude vs Tokyo Jisou Maps

The clearest difference is price: Tokyo Jisou Maps at Free against CorrectAltitude's $0.99. Tokyo Jisou Maps also leads on update cadence (every 3 months vs every 8 months). CorrectAltitude's advantage is in-app purchases (none vs 4) and device support (3 vs 1). On review sentiment and ads there is nothing between them.

Tokyo Jisou Maps is free to download; CorrectAltitude costs $0.99 up front. Tokyo Jisou Maps sells 4 in-app purchases, starting at $0.49 per 7 days. CorrectAltitude asks for nothing beyond the download.

CorrectAltitude ships an update every 8 months, Tokyo Jisou Maps every 3 months. The most recent releases landed on October 26, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | CorrectAltitude | Tokyo Jisou Maps |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 3 months** |
| Monetization | **Paid** | Subscription |
| Size | 3 MB | 10 MB |
| Requires iOS | **13.1** | 17.6 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [koji otani](https://appshunter.io/developer/503754671) | [Japan Map Center, Inc.](https://appshunter.io/developer/392574709) |

## 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


### Tokyo Jisou Maps

[App page](https://appshunter.io/ios/app/tokyo-jisou-maps/id6751535809)

Explore Tokyo's historical evolution through interactive maps from the Meiji era to the present. Overlay past and present views using GPS and time-layer functionality to understand the city's development.

**Highlights:** Historical map overlays, Time-axis exploration (Meiji to present), GPS integration for location context, 3D land origin visualization, Multiple map types (old, terrain, contemporary), Aerial photographs from various eras

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tokyo Jisou Maps (1 week) | $0.49 | per 7 days |
| Tokyo Jisou Maps (1 month) | $0.99 | per month |
| Tokyo Jisou Maps (1 year) | $4.99 | per year |
| Tokyo Jisou Maps (1 year) | $4.99 | per year |


## Frequently asked questions

### Is CorrectAltitude free?

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

### Is Tokyo Jisou Maps free?

Tokyo Jisou Maps is free to download, with in-app purchases available.

### Do CorrectAltitude or Tokyo Jisou Maps have ads?

Neither CorrectAltitude nor Tokyo Jisou Maps shows ads.

### Which is updated more often, CorrectAltitude or Tokyo Jisou Maps?

CorrectAltitude ships an update every 8 months, and Tokyo Jisou Maps every 3 months. Most recently, CorrectAltitude was updated on October 26, 2026 and Tokyo Jisou Maps 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.*