# 蝉妈妈 vs ROI大师

The clearest difference is review sentiment: 蝉妈妈 at 77% against ROI大师's 25%. ROI大师's advantage is ads (none vs shown) and iOS requirement (13.0 vs 15.0). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. 蝉妈妈 sells 15 in-app purchases, starting at $7.99 per month and ROI大师 sells 7 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

蝉妈妈 ships an update every 10 days, ROI大师 every 2 weeks. The most recent releases landed on September 27, 2026 and August 13, 2026 respectively.

## The numbers

| Metric | 蝉妈妈 | ROI大师 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/id1508944184/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | **77.4% of reviews** | 25.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 10 days** | Every 2 weeks |
| Monetization | Free with in-app purchases | Freemium |
| Size | 225 MB | 63 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Xiamen Chanyu Network Technology Co., Ltd.](https://appshunter.io/developer/1546819012) | [丹宁 冯](https://appshunter.io/developer/1452086482) |

## What reviewers say

### 蝉妈妈

[App page](https://appshunter.io/ios/app/id1508944184)

This app provides comprehensive data analysis for the Douyin e-commerce ecosystem. It offers AI-powered tools for product selection, influencer matching, content analysis, and competitor monitoring to optimize sales and marketing strategies. Designed for businesses and individuals involved in short video e-commerce.

**Highlights:** AI-powered product selection, Influencer matching and analysis, Short video content breakdown, Competitor monitoring, Live stream traffic analysis, E-commerce data insights, AI strategy consultation

**Features:** macOS Compatibility, iMessage stickers

**In-app purchases (15)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 蝉妈妈AI会员连续包月订阅 | $7.99 | per month |
| 蝉妈妈连续订阅一个月个人版会员 | $29.99 | per month |
| 蝉妈妈优惠试用连续订阅一个月个人版会员 | $29.99 | per month |
| 蝉妈妈免费3天试用个人版一个月连续订阅会员 | $29.99 | per month |
| 蝉妈妈连续订阅运营版一个月 | $39.99 | per month |
| 蝉妈妈三个月连续订阅个人版会员 | $86.99 | per 3 months |
| 蝉妈妈连续订阅一个月企业版会员 | $254.99 | per month |
| 蝉妈妈连续订阅一年运营版 | $299.99 | per year |
| 蝉妈妈AI蝉豆600 | $9.99 | one-time |
| 蝉妈妈AI蝉豆2500 | $39.99 | one-time |
| 蝉妈妈运营版一个月 | $59.99 | one-time |
| 蝉妈妈三个月个人版会员 | $79.99 | one-time |
| 蝉妈妈AI蝉豆5000个 | $129.99 | one-time |
| 蝉妈妈AI蝉豆10000个 | $249.99 | one-time |
| 蝉妈妈2年运营版会员 | $599.99 | one-time |


### ROI大师

[App page](https://appshunter.io/ios/app/roi/id6743304426)

This tool helps e-commerce operators accurately calculate advertising return on investment (ROI) and optimize pricing strategies. It provides detailed data on ad spend, commissions, profit margins, and break-even points to drive data-informed decisions and reduce wasteful spending.

**Highlights:** Calculate advertising ROI, Optimize product pricing, Analyze ad spend and commissions, Estimate break-even ROI, Simulate costs (logistics, fees), Analyze ad monetization LTV

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 电商ROI计算器月度会员 | $0.99 | per month |
| 电商ROI计算器周度会员 | $0.99 | per 7 days |
| 电商ROI计算器年度会员 | $7.99 | per year |
| 电商ROI计算器周卡会员 | $0.99 | one-time |
| 电商ROI计算器月卡会员 | $2.99 | one-time |
| 电商ROI计算器年卡会员 | $12.99 | one-time |
| 电商ROI计算器终身会员 | $14.99 | one-time |


## Frequently asked questions

### Is 蝉妈妈 free?

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

### Is ROI大师 free?

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

### Do 蝉妈妈 or ROI大师 have ads?

蝉妈妈 shows ads; ROI大师 does not.

### Which is updated more often, 蝉妈妈 or ROI大师?

蝉妈妈 ships an update every 10 days, and ROI大师 every 2 weeks. Most recently, 蝉妈妈 was updated on September 27, 2026 and ROI大师 on August 13, 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.*