# docViewer vs privateSLM

The clearest difference is price: privateSLM at Free against docViewer's $0.99. privateSLM also leads on update cadence (every 8 days vs every 38 months). docViewer's advantage is iOS requirement (14.0 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

privateSLM is free to download; docViewer costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

docViewer ships an update every 38 months, privateSLM every 8 days. The most recent releases landed on October 9, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | docViewer | privateSLM |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/privateslm-offline-ai-chat/id6504996891/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 38 months | **Every 8 days** |
| Monetization | — | Paid |
| Size | 1 MB | 11 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Gianluca Natalini](https://appshunter.io/developer/348380792) | [Vasily Lukin](https://appshunter.io/developer/1754552443) |

## What reviewers say

### docViewer

[App page](https://appshunter.io/ios/app/docviewer/id929695565)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### privateSLM

[App page](https://appshunter.io/ios/app/privateslm-offline-ai-chat/id6504996891)

This AI chat application runs entirely on your device, ensuring complete privacy with no cloud reliance or data leaving your phone. It offers smart engine integration and robust chat management features for seamless, offline use.

**Highlights:** 100% on-device AI processing, No account, cloud, or data sharing, Automatic fastest engine selection, Offline and airplane mode compatible, Full chat history management, Voice input and output, Customizable system prompts

**Features:** Family Sharing, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is docViewer free?

docViewer costs $0.99, with no in-app purchases.

### Is privateSLM free?

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

### Do docViewer or privateSLM have ads?

Neither docViewer nor privateSLM shows ads.

### Which is updated more often, docViewer or privateSLM?

docViewer ships an update every 38 months, and privateSLM every 8 days. Most recently, docViewer was updated on October 9, 2026 and privateSLM on October 20, 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.*