# SIGMA LINK vs e

The clearest difference is rating: e at 5.0 against SIGMA LINK's 1.5. SIGMA LINK's advantage is ratings volume (8 vs 1) and iOS requirement (12.0 vs 14.0). On price, review sentiment, update cadence 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.

e holds the better App Store score, 5.0 against 1.5. That said, the two scores are not equally well evidenced: SIGMA LINK has 8 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 9% of SIGMA LINK's written reviews are positive against 17% of e's.

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | SIGMA LINK | e |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.5 (8 ratings)](https://appshunter.io/ios/app/sigma-link/id1147984544/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/e-sync-connection/id1671992159/reviews)** |
| Number of ratings | **8** | 1 |
| Positive reviews | 9.0% of reviews | **16.7% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | Every 4 months |
| Monetization | Free | Free |
| Size | 76 MB | 30 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SIGMA-ELEKTRO GmbH](https://appshunter.io/developer/803939887) | [ECHOWELL ELECTRONIC CO., LTD](https://appshunter.io/developer/725311213) |

## What reviewers say

### SIGMA LINK

[App page](https://appshunter.io/ios/app/sigma-link/id1147984544)

Easily transfer training data from compatible devices to your smartphone. View personal bests, statistics, and completed tracks. Sync all your training data, workouts, and sport profiles with cloud integration for constant access.

**Highlights:** Transfer training units, View training statistics, Track personal bests, Manage device settings, Sync with SIGMA CLOUD, Access workouts and sport profiles

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

**In-app purchases:** none


### e

[App page](https://appshunter.io/ios/app/e-sync-connection/id1671992159)

This app syncs with compatible e-bike devices to display riding information and record your activities. It tracks your rides using phone GPS, saving them as FIT files that can be uploaded to Strava. You can also connect a heart rate monitor for more detailed data.

**Highlights:** Large sync display, Personal sub screen, Vertical or horizontal display options, E-bike information sync, GPS riding activity recording, Strava auto/manual upload, Heart rate monitor integration

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is SIGMA LINK free?

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

### Is e free?

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

### Which has better reviews, SIGMA LINK or e?

e is rated higher. SIGMA LINK averages 1.5 out of 5 from 8 ratings, while e averages 5.0 from 1 ratings.

### Do SIGMA LINK or e have ads?

Neither SIGMA LINK nor e shows ads.

### Which is updated more often, SIGMA LINK or e?

SIGMA LINK ships an update every 4 months, and e every 4 months. Most recently, SIGMA LINK was updated on November 2, 2026 and e on November 3, 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.*