# Clarity vs PhisBio Lab

The clearest difference is update cadence: Clarity at every 2 weeks against PhisBio Lab's every 3 months. PhisBio Lab's advantage is device support (3 vs 1) and iOS requirement (15.6 vs 18.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Clarity sells 2 in-app purchases, starting at $2.99 per month and PhisBio Lab sells 2 in-app purchases, starting at $8.99 per month. Whichever you choose, the download price is not the number that matters.

Clarity ships an update every 2 weeks, PhisBio Lab every 3 months. The most recent releases landed on October 16, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Clarity | PhisBio Lab |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/clarity-caffeine-tracker/id6748916921/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 months |
| Monetization | Freemium | — |
| Size | 25 MB | 3 MB |
| Requires iOS | 18.0 | **15.6** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [Nexus Nexus](https://appshunter.io/developer/1826114678) | [Ragtime Tech](https://appshunter.io/developer/1865976458) |

## What reviewers say

### 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 |


### PhisBio Lab

[App page](https://appshunter.io/ios/app/phisbio-lab/id6794956012)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PhisBio Lab | $8.99 | per month |
| PhisBio Lab | $17.99 | per month |


## Frequently asked questions

### Is Clarity free?

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

### Is PhisBio Lab free?

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

### Do Clarity or PhisBio Lab have ads?

Neither Clarity nor PhisBio Lab shows ads.

### Which is updated more often, Clarity or PhisBio Lab?

Clarity ships an update every 2 weeks, and PhisBio Lab every 3 months. Most recently, Clarity was updated on October 16, 2026 and PhisBio Lab on October 29, 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.*