# R'studio vs 张大妈

The clearest difference is iOS requirement: R'studio at 10.0 against 张大妈's 14.0. On price, ads, in-app purchases and device support there is nothing between them.

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

## The numbers

| Metric | R'studio | 张大妈 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (2 ratings)](https://appshunter.io/ios/app/ai/id6743843114/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 77.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 2 weeks |
| Monetization | — | Free |
| Size | 60 MB | 119 MB |
| Requires iOS | **10.0** | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Crystal Tsui](https://appshunter.io/developer/1616472051) | [Beijing Zhidemai Technology Co., Ltd.](https://appshunter.io/developer/518213359) |

## What reviewers say

### R'studio

[App page](https://appshunter.io/ios/app/rstudio/id1616472049)

**Features:** macOS Compatibility

**In-app purchases:** none


### 张大妈

[App page](https://appshunter.io/ios/app/ai/id6743843114)

This shopping assistant helps you save money, time, and effort by comparing products across multiple e-commerce platforms. It leverages a neutral consumer knowledge base and AI to find high-value items, track prices, and provide real user reviews to guide your purchasing decisions.

**Highlights:** Cross-platform price tracking, Coupon and discount aggregation, Real user review summaries, Intelligent product comparison, Personalized recommendations, Historical price tracking, Voice and text input support

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is R'studio free?

R'studio is free to download, with no in-app purchases.

### Is 张大妈 free?

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

### Do R'studio or 张大妈 have ads?

Neither R'studio nor 张大妈 shows ads.

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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.*