# Altitude Checker vs A WARMER

The clearest difference is review sentiment: Altitude Checker at 83% against A WARMER's 7%. Altitude Checker also leads on rating (4.0 vs 1.8). A WARMER's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price, ratings volume and device support there is nothing between them.

Both are free to download. Altitude Checker sells 1 one-off in-app purchase. A WARMER asks for nothing beyond the download.

Altitude Checker holds the better App Store score, 4.0 against 1.8. Both are backed by a comparable volume of ratings — 4 and 6 respectively. Written reviews point the same way: 83% of Altitude Checker's written reviews are positive against 7% of A WARMER's.

Altitude Checker ships an update every 4 months, A WARMER every 2 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Altitude Checker | A WARMER |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (4 ratings)](https://appshunter.io/ios/app/altitude-checker/id635168846/reviews)** | [1.8 (6 ratings)](https://appshunter.io/ios/app/a-warmer/id1527382611/reviews) |
| Number of ratings | 4 | **6** |
| Positive reviews | **83.3% of reviews** | 7.1% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 282 MB | 19 MB |
| Requires iOS | 15.0 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Takafumi AMANO](https://appshunter.io/developer/581065340) | [Adastria Co., Ltd.](https://appshunter.io/developer/1218066360) |

## What reviewers say

### Altitude Checker

[App page](https://appshunter.io/ios/app/altitude-checker/id635168846)

Measure altitude using your device's location or by selecting points on a map. Offers various measurement modes and customizable settings for units, datums, and coordinate systems. Includes an option to display addresses or coordinates.

**Highlights:** Map Measurement Mode, GNSS Mode, Digital Elevation Model (DEM) data, Unit selection (Meter/Foot), Special Datum options, Coordinate System selection, Address/Coordinate display

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### A WARMER

[App page](https://appshunter.io/ios/app/a-warmer/id1527382611)

This app controls smart downwear featuring a Japanese heat system. It integrates IT and fashion for wearable devices, combining advanced fiber materials with technology to innovate sports apparel.

**Highlights:** Japanese heat system control, Wearable device integration, IT and fashion fusion, Smart apparel management, Advanced fiber material technology

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Altitude Checker free?

Altitude Checker is free to download, with in-app purchases available.

### Is A WARMER free?

A WARMER is free to download, with no in-app purchases.

### Which has better reviews, Altitude Checker or A WARMER?

Altitude Checker is rated higher. Altitude Checker averages 4.0 out of 5 from 4 ratings, while A WARMER averages 1.8 from 6 ratings.

### Do Altitude Checker or A WARMER have ads?

Altitude Checker shows ads; A WARMER does not.

### Which is updated more often, Altitude Checker or A WARMER?

Altitude Checker ships an update every 4 months, and A WARMER every 2 months. Most recently, Altitude Checker was updated on November 6, 2026 and A WARMER on November 3, 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.*