# 528i vs Focus Builder Pro

The clearest difference is in-app purchases: 528i at none against Focus Builder Pro's 3. On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. Focus Builder Pro sells 3 in-app purchases, starting at $9.99 per month. 528i asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for 528i against 5.0 for Focus Builder Pro. Both are backed by a comparable volume of ratings — 3 and 2 respectively.

528i ships an update fortnightly, Focus Builder Pro every 10 days. The most recent releases landed on June 1, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | 528i | Focus Builder Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/528i/id6738430099/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/focus-builder-pro/id6751810825/reviews) |
| Number of ratings | **3** | 2 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 10 days** |
| Monetization | **Free** | Freemium |
| Size | 35 MB | 50 MB |
| Requires iOS | **14.0.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [528 INNOVATIONS LLC](https://appshunter.io/developer/1780816602) | [NeurdSolutions, LLC](https://appshunter.io/developer/950133465) |

## What reviewers say

### 528i

[App page](https://appshunter.io/ios/app/528i/id6738430099)

This app guides users through laser therapy sessions with step-by-step instructions and instructional videos. It connects to a laser device to optimize timing, frequency, and application for photobiomodulation and low-level laser therapy.

**Highlights:** Step-by-step smart guidance, Interactive instructional videos, Wavelength recommendations, Device connectivity, Precision wellness at home

**In-app purchases:** none


### Focus Builder Pro

[App page](https://appshunter.io/ios/app/focus-builder-pro/id6751810825)

This app offers targeted eye movement exercises designed to enhance brain plasticity and neurotherapeutic outcomes. It provides customizable exercises and patient session building for practitioners, and permanent access to exercises for patients under guidance.

**Highlights:** Targeted eye movement exercises, Brain plasticity enhancement, Customizable exercise settings, Patient session builder, Progress monitoring, Neurotherapeutic outcomes

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Focus Builder Pro Practitioner | $9.99 | per month |
| Focus Builder Pro Practitioner | $69.99 | per year |
| Patient Purchase | $19.99 | one-time |


## Frequently asked questions

### Is 528i free?

528i is free to download, with no in-app purchases.

### Is Focus Builder Pro free?

Focus Builder Pro is free to download, with in-app purchases available.

### Which has better reviews, 528i or Focus Builder Pro?

528i and Focus Builder Pro are both rated 5.0 out of 5 on the App Store, from 3 and 2 ratings respectively.

### Do 528i or Focus Builder Pro have ads?

Neither 528i nor Focus Builder Pro shows ads.

### Which is updated more often, 528i or Focus Builder Pro?

528i ships an update fortnightly, and Focus Builder Pro every 10 days. Most recently, 528i was updated on June 1, 2026 and Focus Builder Pro on September 13, 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.*