PromptSmith vs Personal.AI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PromptSmith
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PromptSmith is an app that automatically generates “optimized prompts” to help you get more accurate and higher-quality responses from AI. Simply enter your question, and the app creates professional-grade instructions that anyone can use—no expertise required. In addition, nothing you type is ever sent outside the app. All processing is completed locally on your device, ensuring safe and secure use. ■ Key Features • No login required — start immediately No account creation, email registration, or setup needed. Just open the app and use it instantly. • Automatically generates optimized prompts from your input Your text is transformed into clear, structured instructions that AI can easily understand, improving response accuracy. • Professional-level prompts for beginners Even without prompt engineering knowledge, anyone can produce high-quality prompts that draw out precise AI responses. • Works with any AI service—not only ChatGPT Compatible with Claude, Gemini, Copilot, LINE AI chat, and most AI platforms. Simply copy and paste the generated prompt.
Personal.AI
An on-device AI assistant that processes information locally for enhanced privacy and structured understanding. It offers web search, local document querying, and agent mode for complex reasoning, all without sending data to external servers.
- On-device AI processing
- Web search integration
- Local RAG for document querying
- Agent mode for multi-step reasoning
- Offline AI experience
- Support for quantized models
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Personal.AI is an on-device AI assistant designed for reading and exploring AI-generated knowledge in a clear, structured, and private way. • All AI runs directly on your device • Interact with powerful models without sending data to external servers • Designed for privacy, readability, and simplicity • Structured answers that make complex topics easy to understand Key Features • On-Device AI Processing All AI runs locally. Your prompts and responses stay private. • Web Search Get real-time answers from the web, even for complex questions. • Local RAG Ask questions using your documents and saved content. • Agent Mode Get smarter answers with multi-step reasoning. • Support for Quantized Models Supports GGUF models for efficient on-device performance. • Offline AI Experience Works fully offline once a model is downloaded. • Model Switching Choose smaller models for speed or larger models for deeper answers. • Structured Reading Interface Clean, layered responses designed for easy reading. • Privacy-First Design No tracking. No data collection. Your data stays with you. Privacy • AI processing happens entirely on your device • No personal data is collected • No data is sent to external servers • No analytics or tracking Our Goal • A non-profit project focused on on-device AI • Built for privacy, readability, and user-first design
Screenshots
Verdict
The clearest difference is ads: Personal.AI at none against PromptSmith's shown. Personal.AI also leads on update cadence (weekly vs every 6 weeks). On price, in-app purchases, device support and iOS requirement 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.
PromptSmith ships an update every 6 weeks, Personal.AI weekly. The most recent releases landed on September 10, 2026 and September 20, 2026 respectively.
| Parameter | PromptSmith | Personal.AI |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (3 ratings) — better |
| Number of ratings | — | 3 — better |
| Update frequency | Every 6 weeks | Weekly — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18.5 | 17.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 15 MB |
| Age rating | 12+ | 4+ |
| Developer | AKIRA SASAKI | Jagadeesh Raghu |
In-app purchases
PromptSmith
No in-app purchases
Personal.AI
No in-app purchases









