# e vs Polytropic

The clearest difference is update cadence: Polytropic at every 3 weeks against e's every 3 months. e's advantage is iOS requirement (11.0 vs 14.2). On price, ads, 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.

e ships an update every 3 months, Polytropic every 3 weeks. The most recent releases landed on October 10, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | e | Polytropic |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (2 ratings)](https://appshunter.io/ios/app/polytropic/id1613713279/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 4.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | — | Free |
| Size | 2 MB | 251 MB |
| Requires iOS | **11.0** | 14.2 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Syndicat Intercommunal du Bassin d'Arcachon](https://appshunter.io/developer/520528809) | [Polytropic](https://appshunter.io/developer/1613713281) |

## What reviewers say

### e

[App page](https://appshunter.io/ios/app/e-navigation/id520528786)

**In-app purchases:** none


### Polytropic

[App page](https://appshunter.io/ios/app/polytropic/id1613713279)

This app provides secure remote management for heat pumps, enabling supervision, preventive maintenance, and easy adjustments. It offers an intuitive interface for monitoring machine status, temperatures, and operating modes, with data stored for five years.

**Highlights:** Secure remote heat pump management, Preventive maintenance and diagnostics, Remote parameter adjustment and optimization, Real-time status monitoring, Error code feedback and proactive service, Data storage for 5 years, Remote water treatment management

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is e free?

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

### Is Polytropic free?

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

### Do e or Polytropic have ads?

Neither e nor Polytropic shows ads.

### Which is updated more often, e or Polytropic?

e ships an update every 3 months, and Polytropic every 3 weeks. Most recently, e was updated on October 10, 2026 and Polytropic on October 11, 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.*