# SpinopelvicMobilityApp vs SiYuan

The clearest difference is price: SiYuan at Free against SpinopelvicMobilityApp's $9.99. SiYuan also leads on update cadence (weekly vs every 10 months). SpinopelvicMobilityApp's advantage is in-app purchases (none vs 2) and device support (4 vs 2). On ads there is nothing between them.

SiYuan is free to download; SpinopelvicMobilityApp costs $9.99 up front. SiYuan sells 2 one-off in-app purchases. SpinopelvicMobilityApp asks for nothing beyond the download.

SpinopelvicMobilityApp ships an update every 10 months, SiYuan weekly. The most recent releases landed on October 7, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | SpinopelvicMobilityApp | SiYuan |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | — | **[4.0 (29 ratings)](https://appshunter.io/ios/app/siyuan/id1583226508/reviews)** |
| Number of ratings | — | **29** |
| Positive reviews | — | 70.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 months | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 1 MB | 419 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [ORTHOPRACTIS.COM SINGLE MEMBER P.C.](https://appshunter.io/developer/1286360877) | [Yunnan Liandi Technology Co., Ltd.](https://appshunter.io/developer/1583226510) |

## What reviewers say

### SpinopelvicMobilityApp

[App page](https://appshunter.io/ios/app/spinopelvicmobilityapp/id1369972895)

**Features:** Vision Pro support

**In-app purchases:** none


### SiYuan

[App page](https://appshunter.io/ios/app/siyuan/id1583226508)

A privacy-focused personal knowledge management system that allows offline use and encrypted data synchronization. It combines blocks, outlines, and bidirectional links to help users organize and refine their thoughts.

**Highlights:** Privacy-first design, Offline data storage, End-to-end encrypted sync, Block-based organization, Outline structuring, Bidirectional linking

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO Features | $79.99 | one-time |
| Subscription | $188.99 | one-time |


## Frequently asked questions

### Is SpinopelvicMobilityApp free?

SpinopelvicMobilityApp costs $9.99, with no in-app purchases.

### Is SiYuan free?

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

### Do SpinopelvicMobilityApp or SiYuan have ads?

Neither SpinopelvicMobilityApp nor SiYuan shows ads.

### Which is updated more often, SpinopelvicMobilityApp or SiYuan?

SpinopelvicMobilityApp ships an update every 10 months, and SiYuan weekly. Most recently, SpinopelvicMobilityApp was updated on October 7, 2026 and SiYuan on October 15, 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.*