# MtM MtConnect04 Pulse Oximeter vs Aetheria

The clearest difference is in-app purchases: MtM MtConnect04 Pulse Oximeter at none against Aetheria's 1. MtM MtConnect04 Pulse Oximeter also leads on update cadence (weekly vs every 4 months) and iOS requirement (9.2 vs 13.0). On price, ads and device support there is nothing between them.

Both are free to download. Aetheria sells 1 one-off in-app purchase. MtM MtConnect04 Pulse Oximeter asks for nothing beyond the download.

MtM MtConnect04 Pulse Oximeter ships an update weekly, Aetheria every 4 months. The most recent releases landed on October 6, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | MtM MtConnect04 Pulse Oximeter | Aetheria |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 4 months |
| Monetization | Free | — |
| Size | 1 MB | 57 MB |
| Requires iOS | **9.2** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [MtM Technology Corporation](https://appshunter.io/developer/1027272974) | [Alperen Eroglu](https://appshunter.io/developer/1872514816) |

## What reviewers say

### MtM MtConnect04 Pulse Oximeter

[App page](https://appshunter.io/ios/app/mtm-mtconnect04-pulse-oximeter/id1108365433)

This app evaluates a development kit for measuring pulse and SpO2. It displays raw PPG sensor data in graphs and connects with specific MtM modules. Designed for developers and researchers.

**Highlights:** Pulse and SpO2 measurement evaluation, Raw PPG sensor data visualization, Development kit compatibility, BLE SiP module integration, Graph display of sensor readings

**Features:** macOS Compatibility

**In-app purchases:** none


### Aetheria

[App page](https://appshunter.io/ios/app/aetheria-spatial-audio-focus/id6758530597)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Aetheria Lifetime Pro | $19.99 | one-time |


## Frequently asked questions

### Is MtM MtConnect04 Pulse Oximeter free?

MtM MtConnect04 Pulse Oximeter is free to download, with no in-app purchases.

### Is Aetheria free?

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

### Do MtM MtConnect04 Pulse Oximeter or Aetheria have ads?

Neither MtM MtConnect04 Pulse Oximeter nor Aetheria shows ads.

### Which is updated more often, MtM MtConnect04 Pulse Oximeter or Aetheria?

MtM MtConnect04 Pulse Oximeter ships an update weekly, and Aetheria every 4 months. Most recently, MtM MtConnect04 Pulse Oximeter was updated on October 6, 2026 and Aetheria 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.*