# Diametre vs Altly

The clearest difference is price: Diametre at Free against Altly's $1.99. Diametre also leads on iOS requirement (13.0 vs 26.0). Altly's advantage is review sentiment (67% vs 50%). On ads, in-app purchases and device support there is nothing between them.

Diametre is free to download; Altly costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Diametre | Altly |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Positive reviews | 50.0% of reviews | **66.7% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Fortnightly |
| Monetization | **Free** | Paid |
| Size | 28 MB | 42 MB |
| Requires iOS | **13.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 17+ | 4+ |
| Developer | [franck bertaux](https://appshunter.io/developer/1806891800) | [Benjamin GODARD](https://appshunter.io/developer/1202933179) |

## What reviewers say

### Diametre

[App page](https://appshunter.io/ios/app/diametre/id6747874263)

Easily calculate the diameter of your roller shutter or blind axis without disassembly or measuring tools. This practical utility app provides a simple solution for accurate measurements.

**Highlights:** Calculate roller shutter axis diameter, Calculate blind axis diameter, No disassembly required, No caliper needed, Simple and practical interface

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

**In-app purchases:** none


### Altly

[App page](https://appshunter.io/ios/app/altly/id6761809139)

Instantly view your current altitude and elevation with a clean, modern interface. It also displays your location on a map, coordinates, place name, and nearby peaks. Supports Apple Watch and unit switching for global usability.

**Highlights:** Live altitude and elevation, Map view with location and coordinates, Nearby peaks identification, Meters/feet unit switching, Apple Watch app and complications, VoiceOver and Dynamic Type support

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is Diametre free?

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

### Is Altly free?

Altly costs $1.99, with no in-app purchases.

### Do Diametre or Altly have ads?

Neither Diametre nor Altly shows ads.

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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.*