SmartChat vs Yemma 4
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SmartChat
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Offer the Guests residing in your hotel and apartment, a simpler and better way to communicate with your staff.
Yemma 4
This AI chat app runs entirely on your iPhone, processing prompts, images, and responses locally. Enjoy private conversations, brainstorm ideas, and summarize notes offline after an initial model download. It requires specific hardware for full functionality.
- 100% on-device AI chat
- No sign-up or subscription required
- Offline functionality after model download
- Local conversation history
- Adjustable response style
- Image understanding
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Yemma 4 is a private AI chat app that runs entirely on your iPhone. It runs Google's Gemma 4 locally through a Swift-native MLX multimodal runtime, so your prompts, images, and responses stay on your device. There is no account to create, no cloud inference service in the middle of your conversations, and no telemetry pipeline watching what you do. Download the model once, then keep chatting on Wi-Fi, cellular, or in airplane mode. Ask questions, brainstorm ideas, rewrite text, summarize notes, describe photos, and have real back-and-forth conversations with image attachments, all processed on-device. Why Yemma 4 feels different: - 100% on-device AI chat - No sign-up, login, or subscription - Offline after the initial model download - Local conversation history you can delete any time - Adjustable response style and creativity controls - Image understanding through the same on-device model Hardware note: - Requires iPhone hardware with the A17 Pro chip or later - First model download is about 4.2 GB, so Wi-Fi and free storage are recommended
Screenshots
Verdict
The clearest difference is update cadence: Yemma 4 at daily against SmartChat's every 5 weeks. SmartChat's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 17.0). On price, ads and in-app purchases 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.
SmartChat ships an update every 5 weeks, Yemma 4 daily. The most recent releases landed on October 27, 2026 and October 19, 2026 respectively.
| Parameter | SmartChat | Yemma 4 |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 5 weeks | Daily — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 35 MB | 28 MB |
| Age rating | 4+ | 4+ |
| Developer | SmartHotel sp. z o.o. | AVMIL LABS LLC |
In-app purchases
SmartChat
No in-app purchases
Yemma 4
No in-app purchases
