# eSense Client vs D2R Tracker

The clearest difference is ads: eSense Client at none against D2R Tracker's shown. eSense Client also leads on iOS requirement (10.0 vs 13.0). D2R Tracker's advantage is update cadence (every 2 days vs every 34 months). On price, in-app purchases and device support there is nothing between them.

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

eSense Client ships an update every 34 months, D2R Tracker every 2 days. The most recent releases landed on October 12, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | eSense Client | D2R Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 34 months | **Every 2 days** |
| Monetization | Free | — |
| Size | 17 MB | 35 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Yuuki Nishiyama](https://appshunter.io/developer/975034759) | [Won Sik Lee](https://appshunter.io/developer/1879954811) |

## What reviewers say

### eSense Client

[App page](https://appshunter.io/ios/app/esense-client/id1494692894)

This application connects to a multi-sensory earable platform via Bluetooth LE to visualize and collect real-time sensor data. It's designed for behavioral analytics research using augmented TWS earbuds.

**Highlights:** Real-time sensor data visualization, Bluetooth LE connectivity, Data collection for research, Supports eSense earable platform, Augmented TWS earbuds integration

**Features:** macOS Compatibility

**In-app purchases:** none


### D2R Tracker

[App page](https://appshunter.io/ios/app/d2r-tracker-terror-uberdiablo/id6759832529)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is eSense Client free?

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

### Is D2R Tracker free?

D2R Tracker is free to download, with no in-app purchases.

### Do eSense Client or D2R Tracker have ads?

D2R Tracker shows ads; eSense Client does not.

### Which is updated more often, eSense Client or D2R Tracker?

eSense Client ships an update every 34 months, and D2R Tracker every 2 days. Most recently, eSense Client was updated on October 12, 2026 and D2R Tracker on October 4, 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.*