# Polytropic vs Back to the Future

The clearest difference is update cadence: Back to the Future at every 9 days against Polytropic's every 3 weeks. 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.

Polytropic ships an update every 3 weeks, Back to the Future every 9 days. The most recent releases landed on October 11, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Polytropic | Back to the Future |
| --- | --- | --- |
| 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 weeks | **Every 9 days** |
| Monetization | Free | — |
| Size | 251 MB | 59 MB |
| Requires iOS | 14.2 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Polytropic](https://appshunter.io/developer/1613713281) | [Invent-App](https://appshunter.io/developer/1437267222) |

## What reviewers say

### 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


### Back to the Future

[App page](https://appshunter.io/ios/app/back-to-the-future/id6768976881)

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

**In-app purchases:** none


## Frequently asked questions

### Is Polytropic free?

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

### Is Back to the Future free?

Back to the Future is free to download, with no in-app purchases.

### Do Polytropic or Back to the Future have ads?

Neither Polytropic nor Back to the Future shows ads.

### Which is updated more often, Polytropic or Back to the Future?

Polytropic ships an update every 3 weeks, and Back to the Future every 9 days. Most recently, Polytropic was updated on October 11, 2026 and Back to the Future on October 16, 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.*