# PriorityLab vs Sprk Pro

The clearest difference is rating: Sprk Pro at 4.0 against PriorityLab's 3.3. Sprk Pro also leads on review sentiment (100% vs 64%) and update cadence (every 3 weeks vs every 2 months). PriorityLab's advantage is iOS requirement (13.0 vs 15.1). On price, ratings volume, 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.

Sprk Pro holds the better App Store score, 4.0 against 3.3. Both are backed by a comparable volume of ratings — 7 and 4 respectively. Written reviews point the same way: 64% of PriorityLab's written reviews are positive against 100% of Sprk Pro's.

PriorityLab ships an update every 2 months, Sprk Pro every 3 weeks. The most recent releases landed on September 14, 2026 and August 12, 2026 respectively.

## The numbers

| Metric | PriorityLab | Sprk Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.3 (7 ratings)](https://appshunter.io/ios/app/prioritylab/id944810145/reviews) | **[4.0 (4 ratings)](https://appshunter.io/ios/app/sprk-pro/id6504923692/reviews)** |
| Number of ratings | **7** | 4 |
| Positive reviews | 63.6% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 14 MB | 154 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [PriorityLab, LLC](https://appshunter.io/developer/473802889) | [Spark Certified Inc](https://appshunter.io/developer/1754339833) |

## What reviewers say

### PriorityLab

[App page](https://appshunter.io/ios/app/prioritylab/id944810145)

This app simplifies mold testing for professionals by digitizing the Chain of Custody process. Log sample data, capture images, and submit electronic forms directly from your mobile device, eliminating the need for paper forms.

**Highlights:** Electronic Chain of Custody submission, Log sample data with photos, Pre-setup inspections, Download inspections to phone, Streamlined workflow

**Features:** macOS Compatibility

**In-app purchases:** none


### Sprk Pro

[App page](https://appshunter.io/ios/app/sprk-pro/id6504923692)

This app helps maximize the value of solar-powered homes by assessing energy efficiency and property value. It provides custom reports on solar performance, longevity, and savings opportunities. Stay informed and protect investments.

**Highlights:** Assess energy efficiency, Understand property value, Discover savings opportunities, Generate custom solar reports, Analyze solar performance, Track solar longevity

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

**In-app purchases:** none


## Frequently asked questions

### Is PriorityLab free?

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

### Is Sprk Pro free?

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

### Which has better reviews, PriorityLab or Sprk Pro?

Sprk Pro is rated higher. PriorityLab averages 3.3 out of 5 from 7 ratings, while Sprk Pro averages 4.0 from 4 ratings.

### Do PriorityLab or Sprk Pro have ads?

Neither PriorityLab nor Sprk Pro shows ads.

### Which is updated more often, PriorityLab or Sprk Pro?

PriorityLab ships an update every 2 months, and Sprk Pro every 3 weeks. Most recently, PriorityLab was updated on September 14, 2026 and Sprk Pro on August 12, 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.*