# AI一下 vs StepFun

The clearest difference is update cadence: StepFun at every 9 days against AI一下's monthly. StepFun also leads on review sentiment (50% vs 38%). AI一下's advantage is ratings volume (25 vs 8) and iOS requirement (13.0 vs 15.1). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. AI一下 sells 3 in-app purchases, starting at $9.99 per month and StepFun sells 13 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.4 for AI一下 against 4.3 for StepFun. Both are backed by a comparable volume of ratings — 25 and 8 respectively. Written reviews are what separate them: 38% of AI一下's written reviews are positive against 50% of StepFun's.

AI一下 ships an update monthly, StepFun every 9 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | AI一下 | StepFun |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (25 ratings)](https://appshunter.io/ios/app/ai-aiai/id6472443333/reviews)** | [4.3 (8 ratings)](https://appshunter.io/ios/app/stepfun-stepfun-ai-assistant/id6502382318/reviews) |
| Number of ratings | **25** | 8 |
| Positive reviews | 37.5% of reviews | **50.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 9 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 75 MB | 114 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 9+ | 17+ |
| Developer | [Sunjoy](https://appshunter.io/developer/1725443308) | [StepFun Intelligence Co., Ltd.](https://appshunter.io/developer/1745274060) |

## What reviewers say

### AI一下

[App page](https://appshunter.io/ios/app/ai-aiai/id6472443333)

Generate and edit images using AI with text prompts. This app offers features like changing backgrounds, repainting parts of an image, and merging multiple images. It also includes AI-powered Q&A and a plaza for discovering user-created AI bots.

**Highlights:** AI image creation from text, AI image editing and modification, Background and element replacement, Local image repainting, Multi-image style merging, AI-powered Q&A and conversation, Inspiration plaza with user-created bots

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月度会员 | $9.99 | per month |
| 年度会员 | $24.99 | per year |
| 终身会员 | $29.99 | one-time |


### StepFun

[App page](https://appshunter.io/ios/app/stepfun-stepfun-ai-assistant/id6502382318)

This AI assistant helps you think and act more efficiently. It offers smart Q&A, document understanding, and task execution, powered by advanced agent capabilities for faster learning and increased productivity. Enjoy voice-first interactions and automated task management.

**Highlights:** Smart Q&A, Document understanding, Task execution, Voice-first interactions, Agent capabilities, Real-time chat

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

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 入门月卡 | $3.99 | per month |
| 入门 | $5.99 | per month |
| 阶跃AI标准套餐 | $7.99 | per month |
| 阶跃AI高级套餐 | $14.99 | per month |
| 进阶 | $29.99 | per month |
| 阶跃AI专业套餐 | $49.99 | per month |
| 专业 | $69.99 | per month |
| 限时一周卡 | $0.99 | one-time |
| 入门 | $5.99 | one-time |
| 基础包 | $5.99 | one-time |
| 高阶包 | $14.99 | one-time |
| 进阶 | $29.99 | one-time |
| 专业 | $69.99 | one-time |


## Frequently asked questions

### Is AI一下 free?

AI一下 is free to download, with in-app purchases available.

### Is StepFun free?

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

### Which has better reviews, AI一下 or StepFun?

AI一下 is rated higher. AI一下 averages 4.4 out of 5 from 25 ratings, while StepFun averages 4.3 from 8 ratings.

### Do AI一下 or StepFun have ads?

Neither AI一下 nor StepFun shows ads.

### Which is updated more often, AI一下 or StepFun?

AI一下 ships an update monthly, and StepFun every 9 days. Most recently, AI一下 was updated on October 24, 2026 and StepFun on October 24, 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.*