# SISTER 進發 vs Narrus

The clearest difference is iOS requirement: SISTER 進發 at 13.0 against Narrus's 26.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

SISTER 進發 ships an update every 5 weeks, Narrus monthly. The most recent releases landed on October 11, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | SISTER 進發 | Narrus |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Monthly** |
| Size | 18 MB | 290 MB |
| Requires iOS | **13.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [GT MARKET CONSULTING CO., LTD.](https://appshunter.io/developer/927846054) | [AtomGradient](https://appshunter.io/developer/1725768404) |

## What reviewers say

### SISTER 進發

[App page](https://appshunter.io/ios/app/sister/id1198930609)

**Features:** macOS Compatibility

**In-app purchases:** none


### Narrus

[App page](https://appshunter.io/ios/app/narrus-new-ai-reader/id6753145556)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SISTER 進發 free?

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

### Is Narrus free?

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

### Do SISTER 進發 or Narrus have ads?

Neither SISTER 進發 nor Narrus shows ads.

### Which is updated more often, SISTER 進發 or Narrus?

SISTER 進發 ships an update every 5 weeks, and Narrus monthly. Most recently, SISTER 進發 was updated on October 11, 2026 and Narrus on October 25, 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.*