# SOSMS vs MarkFlow

The clearest difference is in-app purchases: SOSMS at none against MarkFlow's 3. MarkFlow's advantage is update cadence (weekly vs every 43 months) and device support (4 vs 2). On price and ads there is nothing between them.

Both are free to download. MarkFlow sells 3 in-app purchases, starting at $2.99 per month. SOSMS asks for nothing beyond the download.

SOSMS ships an update every 43 months, MarkFlow weekly. The most recent releases landed on October 8, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | SOSMS | MarkFlow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (4 ratings)](https://appshunter.io/ios/app/markflowread-markdown-files/id6755079420/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 75.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 43 months | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 2 MB | 45 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Murat Caglayan](https://appshunter.io/developer/675022956) | [望 余](https://appshunter.io/developer/1595522298) |

## What reviewers say

### SOSMS

[App page](https://appshunter.io/ios/app/sosms/id1110002902)

**Features:** macOS Compatibility

**In-app purchases:** none


### MarkFlow

[App page](https://appshunter.io/ios/app/markflowread-markdown-files/id6755079420)

A clean and fast reader for Markdown files, offering a comfortable, book-like experience with customizable themes and adjustable text. Easily navigate, search, and share your documents, with developer-friendly features like syntax highlighting.

**Highlights:** Book-like reading layout, Multiple reading themes and dark mode, Adjustable text size, Table of contents generation, In-document search, Syntax highlighting for code blocks, Export to PDF

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $2.99 | per month |
| Yearly Premium | $19.99 | per year |
| Lifetime Access | $12.99 | one-time |


## Frequently asked questions

### Is SOSMS free?

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

### Is MarkFlow free?

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

### Do SOSMS or MarkFlow have ads?

Neither SOSMS nor MarkFlow shows ads.

### Which is updated more often, SOSMS or MarkFlow?

SOSMS ships an update every 43 months, and MarkFlow weekly. Most recently, SOSMS was updated on October 8, 2026 and MarkFlow on October 3, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*