# PI AutoEstima vs Reaction Lab

The clearest difference is rating: Reaction Lab at 5.0 against PI AutoEstima's 3.0. PI AutoEstima's advantage is in-app purchases (none vs 2) and update cadence (every 6 weeks vs every 7 months). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Reaction Lab sells 2 in-app purchases, starting at $1.99 per month. PI AutoEstima asks for nothing beyond the download.

Reaction Lab holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

PI AutoEstima ships an update every 6 weeks, Reaction Lab every 7 months. The most recent releases landed on October 11, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | PI AutoEstima | Reaction Lab |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (1 ratings)](https://appshunter.io/ios/app/pi-autoestima/id656384332/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/reaction-lab-reflex-tests/id6757831974/reviews)** |
| Number of ratings | 1 | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 7 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 16 MB | 22 MB |
| Requires iOS | **6.0** | 18.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Alberto Pascual](https://appshunter.io/developer/605570613) | [Anthony Harvey](https://appshunter.io/developer/1478197285) |

## What reviewers say

### PI AutoEstima

[App page](https://appshunter.io/ios/app/pi-autoestima/id656384332)

This app helps users build self-esteem through daily affirmations and guided meditation. It aims to reprogram negative beliefs and foster self-love and acceptance for a more fulfilling life.

**Highlights:** Reprogramming negative beliefs, Daily affirmations, Guided meditation, Self-love practices, Fostering self-acceptance

**Features:** macOS Compatibility

**In-app purchases:** none


### Reaction Lab

[App page](https://appshunter.io/ios/app/reaction-lab-reflex-tests/id6757831974)

Measure and improve your response speed with a suite of scientifically-inspired tests. Track progress over time with detailed analytics and gain insights into your performance in various situations. Designed for focus and privacy, all data stays on your device.

**Highlights:** Multiple reaction time test types, Visual, audio, and haptic cues, Grip-release and motion-based tests, Dual-task and fatigue tracking, Detailed session summaries and trend charts, On-device data privacy, Offline functionality

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| React Fast Monthly | $1.99 | per month |
| React Fast Yearly | $4.99 | per year |


## Frequently asked questions

### Is PI AutoEstima free?

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

### Is Reaction Lab free?

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

### Which has better reviews, PI AutoEstima or Reaction Lab?

Reaction Lab is rated higher. PI AutoEstima averages 3.0 out of 5 from 1 ratings, while Reaction Lab averages 5.0 from 2 ratings.

### Do PI AutoEstima or Reaction Lab have ads?

Neither PI AutoEstima nor Reaction Lab shows ads.

### Which is updated more often, PI AutoEstima or Reaction Lab?

PI AutoEstima ships an update every 6 weeks, and Reaction Lab every 7 months. Most recently, PI AutoEstima was updated on October 11, 2026 and Reaction Lab on October 31, 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.*