# PDF Tools Pro vs DECAY AI Subscription Tracker

The clearest difference is price: PDF Tools Pro at Free against DECAY AI Subscription Tracker's $1.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

PDF Tools Pro is free to download; DECAY AI Subscription Tracker costs $1.99 up front. PDF Tools Pro sells 1 one-off in-app purchase and DECAY AI Subscription Tracker sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

PDF Tools Pro ships an update monthly, DECAY AI Subscription Tracker every 2 months. The most recent releases landed on October 24, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | PDF Tools Pro | DECAY AI Subscription Tracker |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Size | 5 MB | 3 MB |
| Requires iOS | **18.0** | 18.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [明龙 车](https://appshunter.io/developer/495069166) | [Aneesh Pradeep](https://appshunter.io/developer/1836157821) |

## What reviewers say

### PDF Tools Pro

[App page](https://appshunter.io/ios/app/pdf-tools-pro-scan-and-ocr/id6760276378)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Pro | $7.99 | one-time |


### DECAY AI Subscription Tracker

[App page](https://appshunter.io/ios/app/decay-ai-subscription-tracker/id6773772344)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DECAY Pro Unlock | $9.99 | one-time |


## Frequently asked questions

### Is PDF Tools Pro free?

PDF Tools Pro is free to download, with in-app purchases available.

### Is DECAY AI Subscription Tracker free?

DECAY AI Subscription Tracker costs $1.99, and also offers in-app purchases.

### Do PDF Tools Pro or DECAY AI Subscription Tracker have ads?

Neither PDF Tools Pro nor DECAY AI Subscription Tracker shows ads.

### Which is updated more often, PDF Tools Pro or DECAY AI Subscription Tracker?

PDF Tools Pro ships an update monthly, and DECAY AI Subscription Tracker every 2 months. Most recently, PDF Tools Pro was updated on October 24, 2026 and DECAY AI Subscription Tracker on October 16, 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.*