Onsio vs SynTask
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Onsio
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Introducing Onsio: The World's First Truly Private AI Assistant Welcome to the future of secure, private, and limitless AI interactions. Onsio is your trusted, completely private AI companion designed specifically to put your security first. Enjoy powerful, intuitive, and instant chat conversations with advanced AI without sacrificing your privacy. Unlike other AI apps, Onsio prioritizes your peace of mind above all else, providing unmatched security through robust encryption. Why Onsio? • Privacy Above Everything: Onsio is designed with your privacy as a priority, implementing strong security measures to protect your information. Onsio ensures complete anonymity and privacy, so you can freely ask, share, and explore without worrying about who might be watching. Whether you need immediate answers to complex questions, personalized guidance, or insightful solutions tailored specifically for you, Onsio delivers swiftly, confidentially, and securely. • AI-Powered Web Search and Answers: Onsio utilizes innovative search techniques and advanced language models, offering precise concise summaries and direct comprehensive answers. Onsio goes beyond traditional search engines by synthesizing information instantly, reducing the need to browse through multiple websites. • Real-Time Web Indexing: Continuously updated knowledge bases ensure you always have access to the most current information available online, securely and privately. • Offline Chat Capabilities - Privacy at its Peak: Enjoy Onsio’s chat features even when completely offline. With flexible offline functionality, you can select the most suitable language model tailored specifically to your device’s hardware and personal preferences. No internet connection required means absolute privacy and security, ensuring your conversations remain entirely private and under your exclusive control. • Deep Research, Enhanced by AI: Onsio seamlessly integrates traditional deep research methodologies with advanced AI enhancements, dramatically improving efficiency and accuracy. It automatically retrieves, cross-validates, and synthesizes insights from extensive datasets, reducing complex research from weeks to minutes. Whether for academic research, business intelligence, healthcare insights, or legal inquiries, Onsio empowers you to gain detailed, actionable insights rapidly and securely. • Private Threads, Encrypted Conversations: Enjoy ongoing dialogue with Onsio. Keep threads alive to revisit topics anytime, confident that every word remains encrypted, confidential, and exclusively yours. Onsio redefines AI interaction, empowering you to engage deeply with artificial intelligence while ensuring absolute privacy. Finally, humans have the AI they’ve been waiting for: Smart, Intuitive, Responsive, and above all: secure! Your Data, Your Rules! Download Onsio today - because your privacy matters, always. EULA LINK: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ You can find us at: www.onsio.com https://linkedin.com/company/onsio/about https://instagram.com/onsiotech https://www.facebook.com/people/Onsio/61572172265173 https://x.com/OnsioAI https://youtube.com/@OnsioAi
SynTask
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SynTask is a multi-model AI chat client that lets you connect your own provider accounts, choose the right model for each task and compare answers in one private workspace. CONNECT YOUR AI PROVIDERS Add your own API keys for supported services, including OpenAI, Anthropic, OpenRouter, DeepSeek, Mistral, Groq, Together AI and Perplexity, or connect a compatible custom endpoint. Switch providers and models without rebuilding your workflow. COMPARE MODELS IN ARENA Send one request to several models, review their answers side by side and let a selected model synthesize a final response. Availability depends on your connected providers, keys and model access. BUILD REUSABLE WORKFLOWS • Create prompt skills for recurring tasks. • Connect trusted remote MCP servers and use their tools in supported chats. • Work with text, images, files and voice when the selected model supports them. • Use local conversation memory to retrieve relevant context. • Run supported actions through Shortcuts and Siri. PRIVACY BY DESIGN API keys and MCP authorization headers are stored in the device Keychain. Chats, attachments and the memory index are stored locally until you delete them. SynTask has no intermediary AI server: when you send a request, the selected content is transmitted directly from your device to the AI provider you chose. If you enable an MCP tool, the required arguments may also be sent to the tool server you configured. IMPORTANT INFORMATION SynTask does not provide, sell or resell AI models, API keys, tokens or provider accounts. A separate account and API key from a supported third-party provider are required. Providers may charge for API usage and apply their own availability, age, regional, content, retention and rate-limit rules. SynTask does not control those services. AI-generated responses may be inaccurate, incomplete or inappropriate. Verify important information independently. SynTask is not a substitute for professional medical, legal, financial or other expert advice. Do not send information you are not authorized to share. SynTask is an independent client and is not affiliated with, endorsed by or sponsored by the third-party AI providers it supports. Provider and model names are trademarks of their respective owners. Features vary by provider and model.
Screenshots
Verdict
The clearest difference is in-app purchases: SynTask at none against Onsio's 2. Onsio's advantage is iOS requirement (15.1 vs 17.0). On price, ads 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. Onsio sells 2 in-app purchases, starting at $8.99 per month. SynTask asks for nothing beyond the download.
| Parameter | Onsio | SynTask |
|---|---|---|
| Price | Free | Free |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 30 MB | 5 MB |
| Age rating | 17+ | 17+ |
| Developer | Onsio | Sandspray OU |
In-app purchases
Onsio
- Premium Features$8.991 Month
- Premium Features$89.001 Year
SynTask
No in-app purchases









