# AI Ace vs Scan PDF－Convert Document

The clearest difference is monetization model: AI Ace at free with in-app purchases against Scan PDF－Convert Document's subscription. AI Ace also leads on update cadence (weekly vs every 6 weeks). Scan PDF－Convert Document's advantage is ads (none vs shown) and rating (4.7 vs 4.5). On price, review sentiment, in-app purchases and device support there is nothing between them.

Both are free to download. AI Ace sells 1 one-off in-app purchase and Scan PDF－Convert Document sells 3 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

Scan PDF－Convert Document holds the better App Store score, 4.7 against 4.5. Both are backed by a comparable volume of ratings — 39 and 133 respectively. Written reviews complicate that: 80% of AI Ace's written reviews are positive against 76% of Scan PDF－Convert Document's, so the app with the better star average is not the one people write more warmly about.

AI Ace ships an update weekly, Scan PDF－Convert Document every 6 weeks. The most recent releases landed on August 31, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | AI Ace | Scan PDF－Convert Document |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (39 ratings)](https://appshunter.io/ios/app/ai-ace/id1459935272/reviews) | **[4.7 (133 ratings)](https://appshunter.io/ios/app/scan-pdfconvert-document/id6723880500/reviews)** |
| Number of ratings | 39 | **133** |
| Positive reviews | **80.0% of reviews** | 76.2% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 6 weeks |
| Monetization | **Free with in-app purchases** | Subscription |
| Size | 170 MB | 11 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [kimihiro kubota](https://appshunter.io/developer/500031798) | [Ravi chandran M](https://appshunter.io/developer/1756258598) |

## What reviewers say

### AI Ace

[App page](https://appshunter.io/ios/app/ai-ace/id1459935272)

Pose a single question and receive answers from various AI models, including ChatGPT, Gemini, and Grok. This free application requires no login and offers multiple AI perspectives on your queries.

**Highlights:** Multiple AI model responses, Single question input, No login required, Free to use, Supports ChatGPT, Gemini, Grok

**Features:** Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Word Watch Pro | $19.99 | one-time |


### Scan PDF－Convert Document

[App page](https://appshunter.io/ios/app/scan-pdfconvert-document/id6723880500)

Transform your phone into a powerful document scanner. Effortlessly scan, merge, and organize documents into high-quality PDFs. Convert images to PDFs and share them easily.

**Highlights:** Scan unlimited documents, Merge multiple images into one document, Convert pictures to PDFs, Create PDFs from scanned documents, Organize documents with folders, Share scanned documents via email, Save to cloud storage

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $9.99 | per month |
| Yearly Plan | $29.99 | per year |
| Lifetime Plan | $29.99 | one-time |


## Frequently asked questions

### Is AI Ace free?

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

### Is Scan PDF－Convert Document free?

Scan PDF－Convert Document is free to download, with in-app purchases available.

### Which has better reviews, AI Ace or Scan PDF－Convert Document?

Scan PDF－Convert Document is rated higher. AI Ace averages 4.5 out of 5 from 39 ratings, while Scan PDF－Convert Document averages 4.7 from 133 ratings.

### Do AI Ace or Scan PDF－Convert Document have ads?

AI Ace shows ads; Scan PDF－Convert Document does not.

### Which is updated more often, AI Ace or Scan PDF－Convert Document?

AI Ace ships an update weekly, and Scan PDF－Convert Document every 6 weeks. Most recently, AI Ace was updated on August 31, 2026 and Scan PDF－Convert Document on September 13, 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.*