# SRM PM9 vs EFXLink

The clearest difference is update cadence: EFXLink at every 3 weeks against SRM PM9's every 2 months. On price, rating, ratings volume and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for SRM PM9 against 5.0 for EFXLink. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

SRM PM9 ships an update every 2 months, EFXLink every 3 weeks. The most recent releases landed on June 3, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | SRM PM9 | EFXLink |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/srm-pm9/id1568305482/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/efxlink/id6444688070/reviews) |
| Number of ratings | **2** | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 26 MB | 24 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ulrich Schoberer](https://appshunter.io/developer/1051801775) | [Dongguan Enfitnix Technology Co., Ltd.](https://appshunter.io/developer/1656164350) |

## What reviewers say

### SRM PM9

[App page](https://appshunter.io/ios/app/srm-pm9/id1568305482)

This app provides advanced power measurement for cyclists, offering high accuracy in various conditions. It features magnet-less cadence, left/right balance, and pedal smoothness analysis, connecting seamlessly with ANT+ and Bluetooth devices.

**Highlights:** Magnet-less cadence, Left/Right balance measurement, Pedal smoothness analysis, Automatic temperature compensation, ANT+ and Bluetooth LE connectivity, Rechargeable battery, Zwift compatible

**Features:** macOS Compatibility

**In-app purchases:** none


### EFXLink

[App page](https://appshunter.io/ios/app/efxlink/id6444688070)

Control your Enfitnix bicycle taillights wirelessly via Bluetooth. Adjust brightness, alarm functions, and flashing modes. The app also allows for OTA updates and displays remaining battery power.

**Highlights:** Bluetooth taillight connection, Alarm function on/off, Brightness adjustment, Brake sensing switch, Automatic mode switch, OTA firmware updates, Battery power display

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

**In-app purchases:** none


## Frequently asked questions

### Is SRM PM9 free?

SRM PM9 is free to download, with no in-app purchases.

### Is EFXLink free?

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

### Which has better reviews, SRM PM9 or EFXLink?

SRM PM9 and EFXLink are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.

### Do SRM PM9 or EFXLink have ads?

Neither SRM PM9 nor EFXLink shows ads.

### Which is updated more often, SRM PM9 or EFXLink?

SRM PM9 ships an update every 2 months, and EFXLink every 3 weeks. Most recently, SRM PM9 was updated on June 3, 2026 and EFXLink on September 8, 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.*