# Astradigit vs Phon

The clearest difference is device support: Astradigit at 3 against Phon's 1. Astradigit also leads on iOS requirement (15.0 vs 17.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Astradigit sells 5 in-app purchases, starting at $4.99 per month and Phon sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Astradigit ships an update every 6 days, Phon every 3 days. The most recent releases landed on October 30, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Astradigit | Phon |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 days | **Every 3 days** |
| Size | 76 MB | 1 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Astradigit](https://appshunter.io/developer/1810854565) | [carlos prieto ortiz](https://appshunter.io/developer/1889995023) |

## What reviewers say

### Astradigit

[App page](https://appshunter.io/ios/app/astradigit/id6745117904)

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Lite Access | $4.99 | per month |
| Monthly Premium Access | $19.99 | per month |
| Yearly Premium Access | $179.99 | per year |
| Monthly Premium Access | $19.99 | one-time |
| Yearly Premium Access | $179.99 | one-time |


### Phon

[App page](https://appshunter.io/ios/app/phon-calibrated-spl-meter/id6775261720)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Phon App | $14.99 | one-time |


## Frequently asked questions

### Is Astradigit free?

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

### Is Phon free?

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

### Do Astradigit or Phon have ads?

Neither Astradigit nor Phon shows ads.

### Which is updated more often, Astradigit or Phon?

Astradigit ships an update every 6 days, and Phon every 3 days. Most recently, Astradigit was updated on October 30, 2026 and Phon on October 29, 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.*