# Inverter vs OnlyCat

The clearest difference is ads: Inverter at none against OnlyCat's shown. Inverter also leads on update cadence (every 10 days vs every 3 months) and monetization model (free vs ad-supported). On price, review sentiment, 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.

Inverter ships an update every 10 days, OnlyCat every 3 months. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Inverter | OnlyCat |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/onlycat-smart-cat-flap/id6476429489/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | **92.6% of reviews** | 90.9% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 10 days** | Every 3 months |
| Monetization | **Free** | Ad-supported |
| Size | 24 MB | 61 MB |
| Requires iOS | 15.6 | **15.5** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 12+ |
| Developer | [Richard Russell](https://appshunter.io/developer/1651141744) | [OnlyCat](https://appshunter.io/developer/1726680557) |

## What reviewers say

### Inverter

[App page](https://appshunter.io/ios/app/inverter/id6443976497)

Monitor and manage your GivEnergy inverter(s) with this straightforward application. It allows for independent control of up to three connected inverters. Resetting IP addresses is easily managed through the iOS Files app.

**Highlights:** Monitor inverter status, Control inverter settings, Connect up to three inverters, Independent inverter management, IP address reset via Files app

**Features:** Vision Pro support

**In-app purchases:** none


### OnlyCat

[App page](https://appshunter.io/ios/app/onlycat-smart-cat-flap/id6476429489)

This advanced cat flap uses AI to detect and prevent prey from entering your home. It offers selective access control for each pet, real-time notifications, and allows for timed curfews. Manage multiple cats and track their activities with personalized profiles and video highlights.

**Highlights:** AI prey detection, Selective access control, Smart notifications, Multi-cat management, Timed curfews, Activity tracking, Personalized cat profiles

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Inverter free?

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

### Is OnlyCat free?

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

### Do Inverter or OnlyCat have ads?

OnlyCat shows ads; Inverter does not.

### Which is updated more often, Inverter or OnlyCat?

Inverter ships an update every 10 days, and OnlyCat every 3 months. Most recently, Inverter was updated on November 3, 2026 and OnlyCat on November 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.*