# IDFA Reader vs ASO Keyword Optimizer PutKey

The clearest difference is in-app purchases: IDFA Reader at none against ASO Keyword Optimizer PutKey's 2. IDFA Reader also leads on iOS requirement (11.0 vs 15.0). ASO Keyword Optimizer PutKey's advantage is update cadence (every 6 days vs every 21 months). On price, ads and device support there is nothing between them.

Both are free to download. ASO Keyword Optimizer PutKey sells 2 in-app purchases, starting at $2.99 per month. IDFA Reader asks for nothing beyond the download.

IDFA Reader ships an update every 21 months, ASO Keyword Optimizer PutKey every 6 days. The most recent releases landed on September 8, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | IDFA Reader | ASO Keyword Optimizer PutKey |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 21 months | **Every 6 days** |
| Size | 23 MB | 20 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [矾建 孔](https://appshunter.io/developer/1481446695) | [Asim Can Yagiz](https://appshunter.io/developer/1654138936) |

## What reviewers say

### IDFA Reader

[App page](https://appshunter.io/ios/app/idfa-reader/id1607539208)

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

**In-app purchases:** none


### ASO Keyword Optimizer PutKey

[App page](https://appshunter.io/ios/app/aso-keyword-optimizer-putkey/id6478461133)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Access (Monthly) | $2.99 | per month |
| Unlimited Access (Yearly) | $24.99 | per year |


## Frequently asked questions

### Is IDFA Reader free?

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

### Is ASO Keyword Optimizer PutKey free?

ASO Keyword Optimizer PutKey is free to download, with in-app purchases available.

### Do IDFA Reader or ASO Keyword Optimizer PutKey have ads?

Both IDFA Reader and ASO Keyword Optimizer PutKey show ads.

### Which is updated more often, IDFA Reader or ASO Keyword Optimizer PutKey?

IDFA Reader ships an update every 21 months, and ASO Keyword Optimizer PutKey every 6 days. Most recently, IDFA Reader was updated on September 8, 2026 and ASO Keyword Optimizer PutKey on September 23, 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.*