# Sinogram Star vs PoemShadow

The clearest difference is price: PoemShadow at Free against Sinogram Star's $19.99. PoemShadow also leads on update cadence (every 2 days vs every 3 weeks). Sinogram Star's advantage is in-app purchases (none vs 1) and iOS requirement (12.1 vs 17.0). On ads and device support there is nothing between them.

PoemShadow is free to download; Sinogram Star costs $19.99 up front. PoemShadow sells 1 one-off in-app purchase. Sinogram Star asks for nothing beyond the download.

Sinogram Star ships an update every 3 weeks, PoemShadow every 2 days. The most recent releases landed on May 16, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Sinogram Star | PoemShadow |
| --- | --- | --- |
| Price | $19.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 days** |
| Size | 67 MB | 4 MB |
| Requires iOS | **12.1** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Clavis Sinica Limited](https://appshunter.io/developer/1635273455) | [振文 陈](https://appshunter.io/developer/1693170257) |

## What reviewers say

### Sinogram Star

[App page](https://appshunter.io/ios/app/sinogram-star/id1635273453)

**Features:** macOS Compatibility

**In-app purchases:** none


### PoemShadow

[App page](https://appshunter.io/ios/app/poemshadow/id6618138286)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PoemShadow | $1.99 | one-time |


## Frequently asked questions

### Is Sinogram Star free?

Sinogram Star costs $19.99, with no in-app purchases.

### Is PoemShadow free?

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

### Do Sinogram Star or PoemShadow have ads?

Neither Sinogram Star nor PoemShadow shows ads.

### Which is updated more often, Sinogram Star or PoemShadow?

Sinogram Star ships an update every 3 weeks, and PoemShadow every 2 days. Most recently, Sinogram Star was updated on May 16, 2026 and PoemShadow on September 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.*