# Mnemonizer vs Image to PDF

The clearest difference is in-app purchases: Mnemonizer at none against Image to PDF's 3. Mnemonizer also leads on device support (4 vs 2) and iOS requirement (8.0 vs 17.5). Image to PDF's advantage is update cadence (fortnightly vs every 14 months). On price and ads there is nothing between them.

Both are free to download. Image to PDF sells 3 in-app purchases, starting at $2.99 per 7 days. Mnemonizer asks for nothing beyond the download.

Mnemonizer ships an update every 14 months, Image to PDF fortnightly. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Mnemonizer | Image to PDF |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (4 ratings)](https://appshunter.io/ios/app/mnemonizer/id1126080651/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 14 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 18 MB | 25 MB |
| Requires iOS | **8.0** | 17.5 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Happymagenta UAB](https://appshunter.io/developer/1105393733) | [Kiryl Kaveryn](https://appshunter.io/developer/1817356109) |

## What reviewers say

### Mnemonizer

[App page](https://appshunter.io/ios/app/mnemonizer/id1126080651)

This app offers a unique method to secure sensitive information like PINs and passwords by disguising them within a visually camouflaged grid of random characters. It allows users to create mnemonic cards, mentally mapping data positions for uncrackable privacy.

**Highlights:** Hide PINs and passwords, Mnemonic card system, Camouflaged data display, Automatic iCloud sync, Multiple data cards, Uncrackable security

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases:** none


### Image to PDF

[App page](https://appshunter.io/ios/app/image-to-pdf-scan-and-edit-app/id6746537152)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited access | $2.99 | per 7 days |
| Unlimited access | $3.99 | per month |
| Unlimited access | $17.99 | per year |


## Frequently asked questions

### Is Mnemonizer free?

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

### Is Image to PDF free?

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

### Do Mnemonizer or Image to PDF have ads?

Neither Mnemonizer nor Image to PDF shows ads.

### Which is updated more often, Mnemonizer or Image to PDF?

Mnemonizer ships an update every 14 months, and Image to PDF fortnightly. Most recently, Mnemonizer was updated on October 24, 2026 and Image to PDF on October 25, 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.*