# All Document Reader vs Letter Tracking System

The clearest difference is in-app purchases: Letter Tracking System at none against All Document Reader's 2. All Document Reader's advantage is update cadence (every 2 months vs every 11 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. All Document Reader sells 2 in-app purchases, starting at $0.99 per month. Letter Tracking System asks for nothing beyond the download.

All Document Reader ships an update every 2 months, Letter Tracking System every 11 months. The most recent releases landed on September 20, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | All Document Reader | Letter Tracking System |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 11 months |
| Size | 11 MB | 47 MB |
| Requires iOS | 14.0 | 14.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Dineshbhai Rupareliya](https://appshunter.io/developer/1726586445) | [GCCloud Info System Private Limited](https://appshunter.io/developer/1559340757) |

## What reviewers say

### All Document Reader

[App page](https://appshunter.io/ios/app/all-document-reader-viewer/id6476615980)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads for 1 Month | $0.99 | per month |
| Remove ads for 1 Year | $3.99 | per year |


### Letter Tracking System

[App page](https://appshunter.io/ios/app/letter-tracking-system/id6743742291)

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

**In-app purchases:** none


## Frequently asked questions

### Is All Document Reader free?

All Document Reader is free to download, with in-app purchases available.

### Is Letter Tracking System free?

Letter Tracking System is free to download, with no in-app purchases.

### Do All Document Reader or Letter Tracking System have ads?

Neither All Document Reader nor Letter Tracking System shows ads.

### Which is updated more often, All Document Reader or Letter Tracking System?

All Document Reader ships an update every 2 months, and Letter Tracking System every 11 months. Most recently, All Document Reader was updated on September 20, 2026 and Letter Tracking System on September 9, 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.*