# 4Lexile vs NebulaBuds

The clearest difference is rating: NebulaBuds at 4.4 against 4Lexile's 1.8. NebulaBuds also leads on ratings volume (16K vs 10) and review sentiment (20% vs 0%). 4Lexile's advantage is in-app purchases (none vs 12) and iOS requirement (9.0 vs 14.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. NebulaBuds sells 10 one-off in-app purchases. 4Lexile asks for nothing beyond the download.

NebulaBuds holds the better App Store score, 4.4 against 1.8. That said, the two scores are not equally well evidenced: NebulaBuds has 16K ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 0% of 4Lexile's written reviews are positive against 20% of NebulaBuds's.

4Lexile ships an update every 3 weeks, NebulaBuds fortnightly. The most recent releases landed on October 3, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | 4Lexile | NebulaBuds |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.8 (10 ratings)](https://appshunter.io/ios/app/4lexile/id1493069653/reviews) | **[4.4 (16K ratings)](https://appshunter.io/ios/app/nebulabuds/id6480039371/reviews)** |
| Number of ratings | 10 | **16K** |
| Positive reviews | 0.0% of reviews | **20.1% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 25 MB | 164 MB |
| Requires iOS | **9.0** | 14.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [4point Inc](https://appshunter.io/developer/501903170) | [Shanghai PalmZen Wireless Technology Co.,Ltd](https://appshunter.io/developer/441512718) |

## What reviewers say

### 4Lexile

[App page](https://appshunter.io/ios/app/4lexile/id1493069653)

Scan book ISBNs to quickly discover their Lexile levels. This utility helps users identify appropriate reading materials based on reading proficiency.

**Highlights:** Scan book ISBNs, Find Lexile levels, Identify reading materials

**Features:** macOS Compatibility

**In-app purchases:** none


### NebulaBuds

[App page](https://appshunter.io/ios/app/nebulabuds/id6480039371)

This app offers real-time translation for over 130 languages, supporting audio, video calls, and even text from photos. It features AI-powered voice assistance, meeting summarization, and a unique dual-ear mode for seamless conversations.

**Highlights:** Real-time translation for 133 languages, Photo and text translation with layout preservation, Audio and video call interpretation, AI voice wake-up for information, Dual ear mode for simultaneous conversation, AI meeting notes and summarization, AI smart chat for advice

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 300-minute recording package | $14.99 | one-time |
| 3个月vip | $14.99 | one-time |
| 3 Month VIP | $19.99 | one-time |
| 3-Month VIP | $24.99 | one-time |
| 720-minute recording package | $29.99 | one-time |
| 1年vip | $29.99 | one-time |
| 1 Year VIP | $39.99 | one-time |
| 1-Year VIP | $59.99 | one-time |
| 1800-minute recording package | $59.99 | one-time |
| 1800-minutes recording package | $59.99 | one-time |

**What reviewers like**

- 👍 Good translation accuracy
- 🚀 Impressive AI features
- 💡 Versatile functionality

**What reviewers complain about**

- 🐛 Connectivity issues
- 🔋 Poor battery life
- 👎 Unreliable app performance
- 💸 Expensive subscription
- 🤔 Confusing instructions

**Reported bugs**

- App crashes or freezes
- Earbuds fail to connect
- Translation feature not working as advertised

**Requested features**

- Add more language support
- Improve live translation capabilities
- Streamline app setup and connectivity


## Frequently asked questions

### Is 4Lexile free?

4Lexile is free to download, with no in-app purchases.

### Is NebulaBuds free?

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

### Which has better reviews, 4Lexile or NebulaBuds?

NebulaBuds is rated higher. 4Lexile averages 1.8 out of 5 from 10 ratings, while NebulaBuds averages 4.4 from 16K ratings.

### Do 4Lexile or NebulaBuds have ads?

Neither 4Lexile nor NebulaBuds shows ads.

### Which is updated more often, 4Lexile or NebulaBuds?

4Lexile ships an update every 3 weeks, and NebulaBuds fortnightly. Most recently, 4Lexile was updated on October 3, 2026 and NebulaBuds on October 21, 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.*