# Smartzilla vs RezsiApp

The clearest difference is iOS requirement: Smartzilla at 11.0 against RezsiApp's 13.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Smartzilla ships an update every 9 months, RezsiApp every 16 months. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Smartzilla | RezsiApp |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 58.8% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 9 months** | Every 16 months |
| Monetization | — | Free |
| Size | 171 MB | 31 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [EPS-CONNECT International Zartkoruen Mukodo Reszvenytarsasag](https://appshunter.io/developer/1513342141) | [Elliot Czigany](https://appshunter.io/developer/1517086914) |

## What reviewers say

### Smartzilla

[App page](https://appshunter.io/ios/app/smartzilla/id1513342142)

**Features:** macOS Compatibility

**In-app purchases:** none


### RezsiApp

[App page](https://appshunter.io/ios/app/rezsiapp/id1535617093)

This utility app helps you track and estimate your utility bills. It provides insights into your energy consumption, allowing you to forecast year-end payments and identify potential savings or overpayments. You can also set up notifications and export your data.

**Highlights:** Energy consumption tracking, Year-end payment estimation, Savings identification, Customizable notifications, Data export via email, Separate home/business cost management

**In-app purchases:** none


## Frequently asked questions

### Is Smartzilla free?

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

### Is RezsiApp free?

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

### Do Smartzilla or RezsiApp have ads?

Neither Smartzilla nor RezsiApp shows ads.

### Which is updated more often, Smartzilla or RezsiApp?

Smartzilla ships an update every 9 months, and RezsiApp every 16 months. Most recently, Smartzilla was updated on October 27, 2026 and RezsiApp on October 24, 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.*