# Caty App vs Sleek BYOK

The clearest difference is in-app purchases: Sleek BYOK at none against Caty App's 1. Sleek BYOK also leads on update cadence (every 2 days vs every 2 months). Caty App's advantage is device support (4 vs 1) and iOS requirement (15.5 vs 17.0). On price and ads there is nothing between them.

Both are free to download. Caty App sells 1 one-off in-app purchase. Sleek BYOK asks for nothing beyond the download.

Caty App ships an update every 2 months, Sleek BYOK every 2 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Caty App | Sleek BYOK |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sleek-byok/id6786075866/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 days** |
| Monetization | — | Free |
| Size | 71 MB | 8 MB |
| Requires iOS | **15.5** | 17.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [OU Catyonic](https://appshunter.io/developer/1863920797) | [REGGIE LEE SLABA](https://appshunter.io/developer/6783061972) |

## What reviewers say

### Caty App

[App page](https://appshunter.io/ios/app/caty-app/id6759576079)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 100 AI Messages | $0.99 | one-time |


### Sleek BYOK

[App page](https://appshunter.io/ios/app/sleek-byok/id6786075866)

Access a wide range of AI models, including chat, image, video, voice, and music generation, all within a single, private iOS application. It offers extensive customization options and a distraction-free interface, prioritizing user privacy and direct interaction with AI services.

**Highlights:** Access hundreds of AI models, Generate images, video, music, and voice, Hands-free voice interaction, Customizable system prompts and parameters, Organize context with memories and folders, Private by design, no backend servers, Direct integration with OpenRouter API

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

**In-app purchases:** none


## Frequently asked questions

### Is Caty App free?

Caty App is free to download, with in-app purchases available.

### Is Sleek BYOK free?

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

### Do Caty App or Sleek BYOK have ads?

Neither Caty App nor Sleek BYOK shows ads.

### Which is updated more often, Caty App or Sleek BYOK?

Caty App ships an update every 2 months, and Sleek BYOK every 2 days. Most recently, Caty App was updated on November 5, 2026 and Sleek BYOK on October 31, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*