OMessage vs Cactus Chat
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OMessage
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OMessage is a simple and easy-to-use chat app designed for iOS, allowing you to interact with the your local AI service. With an iMessage-style interface, it provides a familiar and seamless chatting experience. Whether you need information, writing assistance, or just a casual chat, OMessage is here to help. Features: - Multimodal Model Support: Interact with different types of models, supporting text, image, and other input/output formats. - Reasoning Model Support: Engage in complex reasoning and analysis for intelligent conversations. - Message History Management: Easily view and manage your chat history to revisit past conversations. - Model Switching: Quickly switch between different models to meet your specific needs. Note: This app requires a self-hosted Ollama service to function. The icons and model names in the app are solely used to help users differentiate between different AI models and are not part of any commercial promotion.
Cactus Chat
Engage in private conversations with an AI directly on your device. This application runs offline, ensuring your data remains secure and local. Developers can also utilize it to test and compare the performance of different large language models.
- Offline AI conversations
- Private data storage
- Developer LLM benchmarking
- Runs directly on device
- Free to use
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Offline, private AI. Cactus Chat lets you talk to AI, directly on your phone. This means it's free, runs offline, and your data stays on your device. If you're a developer, use Cactus to benchmark the latency and throughput of various LLMs.
Screenshots
Verdict
The clearest difference is update cadence: OMessage at every 5 days against Cactus Chat's monthly. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
OMessage ships an update every 5 days, Cactus Chat monthly. The most recent releases landed on October 28, 2026 and October 30, 2026 respectively.
| Parameter | OMessage | Cactus Chat |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.5 (6 ratings) — better |
| Positive reviews | — | 80.0% of reviews |
| Number of ratings | — | 6 — better |
| Update frequency | Every 5 days — better | Monthly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 12 MB | 43 MB |
| Age rating | 4+ | 4+ |
| Developer | 寰宇 骆 | Roman Shemet |
In-app purchases
OMessage
No in-app purchases
Cactus Chat
No in-app purchases
