# Smart PDF+ Editor vs Secret Notes

The clearest difference is price: Secret Notes at Free against Smart PDF+ Editor's $4.99. Secret Notes also leads on update cadence (every 3 days vs every 4 months). Smart PDF+ Editor's advantage is in-app purchases (none vs 1) and iOS requirement (15.6 vs 26.2). On ads and device support there is nothing between them.

Secret Notes is free to download; Smart PDF+ Editor costs $4.99 up front. Secret Notes sells 1 one-off in-app purchase. Smart PDF+ Editor asks for nothing beyond the download.

Smart PDF+ Editor ships an update every 4 months, Secret Notes every 3 days. The most recent releases landed on October 24, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Smart PDF+ Editor | Secret Notes |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[3.8 (53 ratings)](https://appshunter.io/ios/app/smart-pdf-plus-editor/id1184082898/reviews)** | — |
| Number of ratings | **53** | — |
| Positive reviews | 5.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 days** |
| Monetization | Paid | — |
| Size | 11 MB | 4 MB |
| Requires iOS | **15.6** | 26.2 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Qrayon, LLC](https://appshunter.io/developer/354980265) | [Andreas Grauf](https://appshunter.io/developer/1878952443) |

## What reviewers say

### Smart PDF+ Editor

[App page](https://appshunter.io/ios/app/smart-pdf-plus-editor/id1184082898)

This app allows users to read, sign, and annotate PDF documents, especially with stylus input. It's designed for professionals to quickly handle documents and for students to take notes on study materials. Features include a built-in file manager for organization.

**Highlights:** Ink annotations, Document signing, File organization, PDF reading, Document sharing

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

**In-app purchases:** none


### Secret Notes

[App page](https://appshunter.io/ios/app/secret-notes-private-notepad/id6760174844)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Secret Notes Pro | $2.99 | one-time |


## Frequently asked questions

### Is Smart PDF+ Editor free?

Smart PDF+ Editor costs $4.99, with no in-app purchases.

### Is Secret Notes free?

Secret Notes is free to download, with in-app purchases available.

### Do Smart PDF+ Editor or Secret Notes have ads?

Neither Smart PDF+ Editor nor Secret Notes shows ads.

### Which is updated more often, Smart PDF+ Editor or Secret Notes?

Smart PDF+ Editor ships an update every 4 months, and Secret Notes every 3 days. Most recently, Smart PDF+ Editor was updated on October 24, 2026 and Secret Notes on October 14, 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.*