# Stack Testers Friend vs ADHD Planner AI Task

The clearest difference is in-app purchases: Stack Testers Friend at none against ADHD Planner AI Task's 5. Stack Testers Friend also leads on ads (none vs shown) and review sentiment (100% vs 86%). ADHD Planner AI Task's advantage is update cadence (fortnightly vs every 7 months). On price and device support there is nothing between them.

Both are free to download. ADHD Planner AI Task sells 5 in-app purchases, starting at $9.99 per month. Stack Testers Friend asks for nothing beyond the download.

Stack Testers Friend ships an update every 7 months, ADHD Planner AI Task fortnightly. The most recent releases landed on September 24, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Stack Testers Friend | ADHD Planner AI Task |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (19 ratings)](https://appshunter.io/ios/app/adhd-planner-ai-task-splitti/id6473397856/reviews)** |
| Number of ratings | — | **19** |
| Positive reviews | **100.0% of reviews** | 86.2% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | **Fortnightly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 33 MB | 78 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Lewis Holmes](https://appshunter.io/developer/1454834389) | [Nick Weissberg](https://appshunter.io/developer/1442019483) |

## What reviewers say

### Stack Testers Friend

[App page](https://appshunter.io/ios/app/stack-testers-friend/id1454834390)

This mobile toolkit provides essential on-site calculations for stack testers. Quickly perform gas conversions, probe position calculations, and other vital engineering tasks without needing a laptop. It's designed for environmental engineers needing immediate access to data while working in the field.

**Highlights:** Gas conversion calculations, Isokinetic sample position calculations, Extraction rate calculations, Gas density calculations, Particulate matter normalization, Calibration function calculations

**Features:** macOS Compatibility

**In-app purchases:** none


### ADHD Planner AI Task

[App page](https://appshunter.io/ios/app/adhd-planner-ai-task-splitti/id6473397856)

This app uses AI to break down your goals into manageable steps, personalizing tasks to your work style. It helps combat procrastination with tailored advice and productivity tools like a Pomodoro timer and Eisenhower Matrix. Track your progress and get AI-driven motivation to achieve your goals.

**Highlights:** AI-powered task decomposition, Personalized user profiles, Deep task analysis, Pomodoro timer integration, Eisenhower Matrix prioritization, Productivity tracking, AI chat for motivation

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plus Plan (Monthly) | $9.99 | per month |
| Pro Plan Monthly | $14.99 | per month |
| Pro Plan Annually | $59.99 | per year |
| Plus Plan Annually | $78.99 | per year |
| Pro Plan Annually | $117.99 | per year |


## Frequently asked questions

### Is Stack Testers Friend free?

Stack Testers Friend is free to download, with no in-app purchases.

### Is ADHD Planner AI Task free?

ADHD Planner AI Task is free to download, with in-app purchases available.

### Do Stack Testers Friend or ADHD Planner AI Task have ads?

ADHD Planner AI Task shows ads; Stack Testers Friend does not.

### Which is updated more often, Stack Testers Friend or ADHD Planner AI Task?

Stack Testers Friend ships an update every 7 months, and ADHD Planner AI Task fortnightly. Most recently, Stack Testers Friend was updated on September 24, 2026 and ADHD Planner AI Task on October 11, 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.*