# Backplain vs ChatinShield

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.

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.

## The numbers

| Metric | Backplain | ChatinShield |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/backplain-compare-ai/id6474154184/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/chatinshield/id6757831990/reviews) |
| Number of ratings | **3** | 2 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 37 MB | 65 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Backplain Inc.](https://appshunter.io/developer/1719066654) | [Li Peng](https://appshunter.io/developer/1838243218) |

## What reviewers say

### Backplain

[App page](https://appshunter.io/ios/app/backplain-compare-ai/id6474154184)

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.

**Highlights:** Access 30+ AI models, Side-by-side response comparison, Boost productivity, Affordable subscription, Private and secure

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Backplain Pro Monthly | $9.99 | per month |
| Backplain Pro Yearly | $99.99 | per year |


### ChatinShield

[App page](https://appshunter.io/ios/app/chatinshield/id6757831990)

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.

**Highlights:** 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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Backplain free?

Backplain is free to download, with in-app purchases available.

### Is ChatinShield free?

ChatinShield is free to download, with no in-app purchases.

### Which has better reviews, Backplain or ChatinShield?

Backplain and ChatinShield are both rated 5.0 out of 5 on the App Store, from 3 and 2 ratings respectively.

### Do Backplain or ChatinShield have ads?

Neither Backplain nor ChatinShield shows ads.

### Which is updated more often, Backplain or ChatinShield?

Backplain ships an update monthly, and ChatinShield every 2 weeks. Most recently, Backplain was updated on September 26, 2026 and ChatinShield on September 30, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*