# NextSense vs Calibrex App

The clearest difference is rating: NextSense at 4.8 against Calibrex App's 3.5. NextSense also leads on update cadence (every 6 days vs fortnightly) and ratings volume (89 vs 11). Calibrex App's advantage is device support (3 vs 1) and iOS requirement (15.1 vs 17.6). On price, review sentiment, 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.

NextSense holds the better App Store score, 4.8 against 3.5. That said, the two scores are not equally well evidenced: NextSense has 89 ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 54% of NextSense's written reviews are positive against 50% of Calibrex App's.

NextSense ships an update every 6 days, Calibrex App fortnightly. The most recent releases landed on November 5, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | NextSense | Calibrex App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (89 ratings)](https://appshunter.io/ios/app/nextsense/id6636482744/reviews)** | [3.5 (11 ratings)](https://appshunter.io/ios/app/calibrex-app/id6741951538/reviews) |
| Number of ratings | **89** | 11 |
| Positive reviews | **54.2% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 days** | Fortnightly |
| Monetization | Free | Free |
| Size | 1.9 GB | 150 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Lucid Reality](https://appshunter.io/developer/1417122334) | [CalibrexInc](https://appshunter.io/developer/1485591463) |

## What reviewers say

### NextSense

[App page](https://appshunter.io/ios/app/nextsense/id6636482744)

This app works with brain-responsive earbuds to enhance sleep quality. It tracks brain activity to personalize audio, offering insights into sleep patterns and a gentle alarm. Integration with Apple Health provides further personalized data.

**Highlights:** Brainwave tracking for sleep depth, Personalized audio for better rest, Detailed sleep reports and trends, Automatic audio pause when asleep, Nap mode with timer and soundscapes, Soothing sound library, Gentle alarm with calming sounds

**In-app purchases:** none


### Calibrex App

[App page](https://appshunter.io/ios/app/calibrex-app/id6741951538)

This wearable device precisely tracks your weightlifting reps, rest, and movements. It provides personalized insights into your training, offering live audio coaching and tailored workouts to help you achieve your strength, speed, or endurance goals.

**Highlights:** Precise rep, rest, and movement tracking, Live audio coaching tailored to goals, Personalized insights into training performance, Advanced tracking and tailored workouts, Set Score, Difficulty Score, Speed Score, Tempo Score, Discover training trends and program balance

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

**In-app purchases:** none


## Frequently asked questions

### Is NextSense free?

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

### Is Calibrex App free?

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

### Which has better reviews, NextSense or Calibrex App?

NextSense is rated higher. NextSense averages 4.8 out of 5 from 89 ratings, while Calibrex App averages 3.5 from 11 ratings.

### Do NextSense or Calibrex App have ads?

Neither NextSense nor Calibrex App shows ads.

### Which is updated more often, NextSense or Calibrex App?

NextSense ships an update every 6 days, and Calibrex App fortnightly. Most recently, NextSense was updated on November 5, 2026 and Calibrex App on October 30, 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.*