# SDX.FM vs StoneNote

The clearest difference is in-app purchases: SDX.FM at none against StoneNote's 1. SDX.FM also leads on iOS requirement (13.0 vs 16.0). StoneNote's advantage is update cadence (every 10 days vs every 5 months). On price, ads and device support there is nothing between them.

Both are free to download. StoneNote sells 1 one-off in-app purchase. SDX.FM asks for nothing beyond the download.

SDX.FM ships an update every 5 months, StoneNote every 10 days. The most recent releases landed on October 4, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | SDX.FM | StoneNote |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.4 (5 ratings)](https://appshunter.io/ios/app/stonenote-video-study-notes/id6479307006/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 10 days** |
| Monetization | — | Free with in-app purchases |
| Size | 160 MB | 43 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [liveFacilities](https://appshunter.io/developer/933557362) | [斯熠 巩](https://appshunter.io/developer/1735501144) |

## What reviewers say

### SDX.FM

[App page](https://appshunter.io/ios/app/sdxfm/id1469971848)

**Features:** macOS Compatibility

**In-app purchases:** none


### StoneNote

[App page](https://appshunter.io/ios/app/stonenote-video-study-notes/id6479307006)

Seamlessly take handwritten notes while watching study videos on the same page. This app integrates a video player directly into your notes, allowing for automatic pausing, screenshot capture, and video bookmarking. Organize your work with layered notes and folders, and sync across devices.

**Highlights:** Integrated video player within notes, Automatic video pause while writing, Screenshot capture and insertion, Layered notes support, Folder-based organization, iCloud sync

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| StoneNote Pro | $4.99 | one-time |


## Frequently asked questions

### Is SDX.FM free?

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

### Is StoneNote free?

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

### Do SDX.FM or StoneNote have ads?

Neither SDX.FM nor StoneNote shows ads.

### Which is updated more often, SDX.FM or StoneNote?

SDX.FM ships an update every 5 months, and StoneNote every 10 days. Most recently, SDX.FM was updated on October 4, 2026 and StoneNote on October 8, 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.*