# Back in Time vs StroopEffect2

The clearest difference is review sentiment: StroopEffect2 at 100% against Back in Time's 76%. StroopEffect2 also leads on price ($2.99 vs $7.99) and device support (3 vs 1). Back in Time's advantage is update cadence (every 7 months vs every 14 months). On ads, in-app purchases, monetization model and iOS requirement there is nothing between them.

Back in Time costs $7.99 and StroopEffect2 $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Back in Time ships an update every 7 months, StroopEffect2 every 14 months. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Back in Time | StroopEffect2 |
| --- | --- | --- |
| Price | $7.99 | **$2.99** |
| Rating | **[4.7 (27 ratings)](https://appshunter.io/ios/app/back-in-time/id450345693/reviews)** | — |
| Number of ratings | **27** | — |
| Positive reviews | 75.9% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 7 months** | Every 14 months |
| Monetization | Paid | Paid |
| Size | 836 MB | 2 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Landka](https://appshunter.io/developer/450345696) | [Yasuyoshi Ota](https://appshunter.io/developer/1500357652) |

## What reviewers say

### Back in Time

[App page](https://appshunter.io/ios/app/back-in-time/id450345693)

Explore the history of the Universe, Earth, Life, and Civilization through an immersive, interactive journey. This app uses custom animations, timelines, and interesting facts to bring historical events to life. It's designed to help users understand the connections between events and see the bigger picture.

**Highlights:** Interactive timeline of events, Custom animations and videos, Over 350 remarkable images, Little-known interesting facts, Offline access, Multilingual support

**Features:** macOS Compatibility

**In-app purchases:** none


### StroopEffect2

[App page](https://appshunter.io/ios/app/stroopeffect2/id1050388935)

This app demonstrates the psychological phenomenon known as the Stroop effect. It presents a time-trial game where users must identify the color of words, even when the word itself names a different color. It's a fun way to explore cognitive processing and reaction times.

**Highlights:** Stroop effect demonstration, Time trial game mode, Cognitive processing experiment, Reaction time measurement, Educational psychology tool

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

**In-app purchases:** none


## Frequently asked questions

### Is Back in Time free?

Back in Time costs $7.99, with no in-app purchases.

### Is StroopEffect2 free?

StroopEffect2 costs $2.99, with no in-app purchases.

### Do Back in Time or StroopEffect2 have ads?

Neither Back in Time nor StroopEffect2 shows ads.

### Which is updated more often, Back in Time or StroopEffect2?

Back in Time ships an update every 7 months, and StroopEffect2 every 14 months. Most recently, Back in Time was updated on November 6, 2026 and StroopEffect2 on November 2, 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.*