Backplain vs ChatinShield
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Backplain
Access over 30 AI models in one app to get faster, better answers. Compare responses from multiple AI engines side-by-side to instantly find the smartest solution. Boost productivity for research, writing, coding, and more.
- Access 30+ AI models
- Side-by-side response comparison
- Boost productivity
- Affordable subscription
- Private and secure
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Backplain – Your All-in-One AI Chat Hub Access 30+ powerful AI models in one place and get better answers faster. Backplain sends your prompt to up to 10 AI engines at once—so you can compare responses side-by-side and instantly pick the smartest solution. Why Backplain? Multiple AI Models, One App: Chat with top AI engines like ChatGPT, PaLM, Llama, and more—all from a single interface. Instant Side-by-Side Comparison: Skip the guesswork. See how different AI models respond and choose the answer that works best for you. Boost Your Productivity: Perfect for research, writing, studying, coding help, brainstorming, decision-making, and idea exploration. One Affordable Subscription: Unlimited access to all AI models for just $9.99/month. No extra tokens or hidden fees. Private & Secure: Built with modern security and privacy practices to help keep your data safe. How It Works Install Backplain Sign up and start chatting Send a prompt Watch up to 10 AI models respond simultaneously Compare answers and pick the best one Backplain is built for students, professionals, creators, researchers, and anyone who wants reliable, high-quality answers—fast. Discover smarter insights, save time, and elevate your workflow with the power of multi-model AI. Start your free trial today and experience AI like never before. We are the Backplane of AI! This application is subject to the standard Apple EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
ChatinShield
This app provides access to multiple leading AI models for document analysis, with a strong emphasis on user privacy. It automatically filters sensitive information and allows users to bring their own API keys for direct payment to AI providers.
- Access multiple AI models
- Automatic PII filtering
- Bring Your Own API Keys
- Analyze Word, Excel, and text files
- Customizable data filters
- Secure local storage
- Dark mode and themes
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ChatinShield: Your Private Multi-AI Assistant Connect to the world's leading AI models - ChatGPT, Claude, Gemini, and Ollama - all in one secure app. ChatinShield puts privacy first with built-in protection for your sensitive information when you use AI to analyze docs KEY FEATURES • Multiple AI Models Access OpenAI GPT, Anthropic Claude, Google Gemini, and Ollama from a single interface. Switch between models instantly to get the best results for your needs. • Privacy Protection Advanced PII filtering automatically detects and protects sensitive information including phone numbers, emails, addresses, and credit cards before sending to AI services. • Bring Your Own API Keys No subscriptions or usage limits. Use your own API keys and pay only for what you use directly to the AI providers. • Document Support Upload and analyze Word documents, Excel files, and text file. Let AI do the heavy lifting. • Custom Filters Create personalized filter patterns to protect information specific to your needs. Full control over what data gets filtered. • Dark Mode & Themes Beautiful interface with automatic light/dark mode support and multiple chat styles to match your preference. • Local Storage All API keys and settings stored securely on your device. We never see or store your conversations or credentials. PERFECT FOR • Professionals handling sensitive client information • Students and researchers analyzing documents • Privacy-conscious users who want control over their data WHY CHATINSHIELD? Unlike other AI apps, ChatinShield never stores your conversations or API keys on our servers. Everything stays on your device. Our advanced filtering technology helps protect your privacy automatically, while giving you the flexibility to use any combination of AI models. GETTING STARTED 1. Download ChatinShield 2. Add your API keys from OpenAI, Anthropic, Google, or OpenRouter 3. Upload documents for analysis 4. Customize filters to protect your specific data 5. Give order to AI to analyze your docs No subscriptions. No hidden fees. No data collection.
Screenshots
Verdict
The clearest difference is in-app purchases: ChatinShield at none against Backplain's 2. On price, rating, ratings volume and update cadence 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. Backplain sells 2 in-app purchases, starting at $9.99 per month. ChatinShield asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for Backplain against 5.0 for ChatinShield. Both are backed by a comparable volume of ratings — 3 and 2 respectively.
Backplain ships an update monthly, ChatinShield every 2 weeks. The most recent releases landed on September 26, 2026 and September 30, 2026 respectively.
| Parameter | Backplain | ChatinShield |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) | 5.0 (2 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 3 — better | 2 |
| Update frequency | Monthly | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 15.1 |
| Further details — not scored | ||
| Size | 37 MB | 65 MB |
| Age rating | 17+ | 17+ |
| Developer | Backplain Inc. | Li Peng |
Customer experience
Backplain
ChatinShield
In-app purchases
Backplain
- Backplain Pro Monthly14 Days trial$9.991 Month
- Backplain Pro Yearly1 Year trial$99.991 Year
ChatinShield
No in-app purchases









