# USTA Flex vs AceiiLab

The clearest difference is review sentiment: AceiiLab at 100% against USTA Flex's 41%. AceiiLab also leads on rating (5.0 vs 4.8). USTA Flex's advantage is ratings volume (642 vs 4) and iOS requirement (13.0 vs 15.0). 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.

AceiiLab holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: USTA Flex has 642 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 41% of USTA Flex's written reviews are positive against 100% of AceiiLab's.

USTA Flex ships an update fortnightly, AceiiLab every 2 weeks. The most recent releases landed on October 15, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | USTA Flex | AceiiLab |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (642 ratings)](https://appshunter.io/ios/app/usta-flex/id6446393326/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/aceiilab/id6789068785/reviews)** |
| Number of ratings | **642** | 4 |
| Positive reviews | 40.7% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 weeks |
| Monetization | Free | Free |
| Size | 133 MB | 118 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [USTA](https://appshunter.io/developer/327455872) | [一思(深圳)人工智能有限公司](https://appshunter.io/developer/1831256217) |

## What reviewers say

### USTA Flex

[App page](https://appshunter.io/ios/app/usta-flex/id6446393326)

Find and play competitive tennis matches at your level on courts near you. Arrange games flexibly around your schedule and meet new players. Track your progress and improve your game with level-based singles or doubles matches.

**Highlights:** Find level-based tennis matches, Flexible scheduling with in-app chat, Singles and doubles competition, Track match history and progress, Utilizes ITF World Tennis Number for matchmaking, Organize and enter leagues

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

**In-app purchases:** none


### AceiiLab

[App page](https://appshunter.io/ios/app/aceiilab/id6789068785)

Control a tennis robot to practice serves, volleys, and custom drills. Track your training data in real-time without a partner. Ideal for solo tennis practice at home or on the court.

**Highlights:** Bluetooth robot control, Adjust serve speed and spin, Preset training modes, Custom training schemes, Real-time stroke data recording, Solo practice capabilities

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

**In-app purchases:** none


## Frequently asked questions

### Is USTA Flex free?

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

### Is AceiiLab free?

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

### Which has better reviews, USTA Flex or AceiiLab?

AceiiLab is rated higher. USTA Flex averages 4.8 out of 5 from 642 ratings, while AceiiLab averages 5.0 from 4 ratings.

### Do USTA Flex or AceiiLab have ads?

Neither USTA Flex nor AceiiLab shows ads.

### Which is updated more often, USTA Flex or AceiiLab?

USTA Flex ships an update fortnightly, and AceiiLab every 2 weeks. Most recently, USTA Flex was updated on October 15, 2026 and AceiiLab on October 9, 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.*