# ESi Centro vs AUN

The clearest difference is iOS requirement: AUN at 13.0 against ESi Centro's 15.1. 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.

## The numbers

| Metric | ESi Centro | AUN |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 16.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | — |
| Monetization | Paid | — |
| Size | 42 MB | 25 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ESI Controls Ltd](https://appshunter.io/developer/1151779580) | [Maulik Raja](https://appshunter.io/developer/1719985291) |

## What reviewers say

### ESi Centro

[App page](https://appshunter.io/ios/app/esi-centro/id1151779581)

Control your home's heating and cooling remotely with this smart thermostat. It offers sophisticated energy-saving features for enhanced comfort and control.

**Highlights:** Programmable room thermostat, Quick installation, Easy to use, Energy saving features, High level of control, Enhanced comfort

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

**In-app purchases:** none

**What reviewers like**

- 👍 Works well once connected
- 👍 Basic functionality is good
- 👍 Integration with Alexa works well
- 👍 App works perfectly fine
- 👍 Basic functionality is generally good

**What reviewers complain about**

- 🐛 Painful connection process
- 🐛 Frequent connection issues
- 🐛 App cannot find thermostat
- 🐛 Nightmare to connect
- 🐛 Barely works, sometimes not at all

**Reported bugs**

- Connection issues after updates
- App cannot find thermostat
- 5GHz WiFi issues
- Setup requires turning off 5GHz WiFi
- Permissions not requested at outset

**Requested features**

- Option to rename devices
- 15/30 minute boost on heating
- Option for a 15/30 minute boost on heating
- Option to remove Hot Water for combi-boiler users
- Option to rename thermostats


### AUN

[App page](https://appshunter.io/ios/app/aun-emi-calculator/id6761736444)

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

**In-app purchases:** none


## Frequently asked questions

### Is ESi Centro free?

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

### Is AUN free?

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

### Do ESi Centro or AUN have ads?

Neither ESi Centro nor AUN shows ads.

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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.*