# Nitro Athletic Complex vs Clarity

The clearest difference is in-app purchases: Nitro Athletic Complex at none against Clarity's 2. Nitro Athletic Complex also leads on ratings volume (31 vs 2) and device support (3 vs 1). Clarity's advantage is update cadence (every 2 weeks vs every 2 months) and rating (5.0 vs 4.7). On price and ads there is nothing between them.

Both are free to download. Clarity sells 2 in-app purchases, starting at $2.99 per month. Nitro Athletic Complex asks for nothing beyond the download.

Clarity holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Nitro Athletic Complex has 31 ratings behind it against 2, so its average is the more settled of the two.

Nitro Athletic Complex ships an update every 2 months, Clarity every 2 weeks. The most recent releases landed on October 30, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Nitro Athletic Complex | Clarity |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (31 ratings)](https://appshunter.io/ios/app/nitro-athletic-complex/id6744453677/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/clarity-caffeine-tracker/id6748916921/reviews)** |
| Number of ratings | **31** | 2 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | **Free** | Freemium |
| Size | 56 MB | 25 MB |
| Requires iOS | **14.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [TeamUp Sports](https://appshunter.io/developer/1449504626) | [Nexus Nexus](https://appshunter.io/developer/1826114678) |

## What reviewers say

### Nitro Athletic Complex

[App page](https://appshunter.io/ios/app/nitro-athletic-complex/id6744453677)

This app guides your health and fitness journey by allowing you to book classes online. It integrates with Apple Health to track daily steps, distance, and calories burned, and can import data from wearable devices.

**Highlights:** Online class booking, Apple Health integration, Step tracking, Distance tracking, Calorie tracking, Wearable device data import

**Features:** macOS Compatibility

**In-app purchases:** none


### Clarity

[App page](https://appshunter.io/ios/app/clarity-caffeine-tracker/id6748916921)

This app helps you understand the impact of caffeine on your sleep, energy, and focus. Log your intake quickly and visualize how caffeine's half-life affects your daily cycles and nighttime rest.

**Highlights:** Fast caffeine logging, Caffeine half-life tracking, Sleep and recovery insights, Focus and energy analysis, Daily and weekly insights

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Clarity Plus - Monthly | $2.99 | per month |
| Clarity Plus - Yearly | $19.99 | per year |


## Frequently asked questions

### Is Nitro Athletic Complex free?

Nitro Athletic Complex is free to download, with no in-app purchases.

### Is Clarity free?

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

### Which has better reviews, Nitro Athletic Complex or Clarity?

Clarity is rated higher. Nitro Athletic Complex averages 4.7 out of 5 from 31 ratings, while Clarity averages 5.0 from 2 ratings.

### Do Nitro Athletic Complex or Clarity have ads?

Neither Nitro Athletic Complex nor Clarity shows ads.

### Which is updated more often, Nitro Athletic Complex or Clarity?

Nitro Athletic Complex ships an update every 2 months, and Clarity every 2 weeks. Most recently, Nitro Athletic Complex was updated on October 30, 2026 and Clarity on October 16, 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.*