# ANGSTROM vs ROMES Probe

The clearest difference is device support: ANGSTROM at 3 against ROMES Probe's 1. ANGSTROM also leads on iOS requirement (11.0 vs 16.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on June 11, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | ANGSTROM | ROMES Probe |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | Every 4 months |
| Size | 10 MB | 1 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [PURGATIO inc.](https://appshunter.io/developer/1581986238) | [Rohde & Schwarz GmbH & Co. KG](https://appshunter.io/developer/364229795) |

## What reviewers say

### ANGSTROM

[App page](https://appshunter.io/ios/app/angstrom/id1588375718)

**Features:** macOS Compatibility

**In-app purchases:** none


### ROMES Probe

[App page](https://appshunter.io/ios/app/romes-probe/id6445962802)

**In-app purchases:** none


## Frequently asked questions

### Is ANGSTROM free?

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

### Is ROMES Probe free?

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

### Do ANGSTROM or ROMES Probe have ads?

Neither ANGSTROM nor ROMES Probe shows ads.

### Which is updated more often, ANGSTROM or ROMES Probe?

ANGSTROM ships an update every 4 months, and ROMES Probe every 4 months. Most recently, ANGSTROM was updated on June 11, 2026 and ROMES Probe on September 15, 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.*