# Causality vs Ada's Study

The clearest difference is rating: Causality at 4.4 against Ada's Study's 3.6. Causality also leads on review sentiment (70% vs 53%) and ratings volume (185 vs 35). Ada's Study's advantage is update cadence (every 2 weeks vs every 3 months) and price ($0.99 vs $1.99). On ads, in-app purchases, monetization model and device support there is nothing between them.

Causality costs $1.99 and Ada's Study $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Causality holds the better App Store score, 4.4 against 3.6. That said, the two scores are not equally well evidenced: Causality has 185 ratings behind it against 35, so its average is the more settled of the two. Written reviews point the same way: 70% of Causality's written reviews are positive against 53% of Ada's Study's.

Causality ships an update every 3 months, Ada's Study every 2 weeks. The most recent releases landed on October 1, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Causality | Ada's Study |
| --- | --- | --- |
| Price | $1.99 | **$0.99** |
| Rating | **[4.4 (185 ratings)](https://appshunter.io/ios/app/causality/id928945016/reviews)** | [3.6 (35 ratings)](https://appshunter.io/ios/app/adas-study/id1550115133/reviews) |
| Number of ratings | **185** | 35 |
| Positive reviews | **69.8% of reviews** | 52.6% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | Paid | Paid |
| Size | 166 MB | 281 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 9+ |
| Developer | [Loju LTD](https://appshunter.io/developer/928945015) | [Sherlocked](https://appshunter.io/developer/1071729603) |

## What reviewers say

### Causality

[App page](https://appshunter.io/ios/app/causality/id928945016)

Manipulate time to solve intricate puzzles and guide stranded astronauts to safety. Work with your past selves across alien landscapes to overcome paradoxes and complete hazardous levels within a time limit.

**Highlights:** Manipulate time to change level outcomes, Work with past selves, Solve paradoxes, Guide astronauts to safety, 60 challenging levels, Unlock achievements

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Unique and challenging puzzles
- 👍 Intuitive and easy-to-use UI
- 🎨 Beautiful graphics and sound design
- 💡 Innovative time travel mechanics
- 🧠 Mind-bending gameplay

**What reviewers complain about**

- 🐛 Bugs and glitches in certain levels
- 🤔 Lack of clear instructions or tutorials
- 🕹️ Unintuitive controls on some devices
- 🔁 Repetitive gameplay after a while

**Reported bugs**

- Certain levels (e.g. 307, 407, 410) not working as expected
- Game crashing or freezing on some devices
- Issues with achievements not unlocking properly

**Requested features**

- More levels and content
- Ability to replay completed levels
- Cloud save/sync support
- Difficulty settings or options


### Ada's Study

[App page](https://appshunter.io/ios/app/adas-study/id1550115133)

Explore Ada Lovelace's study to uncover a hidden mystery. Solve intricate mechanical puzzles and interact with objects using intuitive touch controls in a beautifully crafted 3D environment. Unravel secrets of epic proportions in this engaging puzzle adventure.

**Highlights:** Investigate Ada Lovelace's disappearance, Solve intricate mechanical puzzles, Intuitive touch interactions, Beautifully crafted 3D visuals, Uncover a secret narrative

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

**In-app purchases:** none

**What reviewers like**

- ✨ Beautiful graphics and art
- 🧩 Clever and well-crafted puzzles
- 📚 Captivating and interesting story
- 👍 Smooth and intuitive gameplay
- 💡 Well-developed host personality

**What reviewers complain about**

- ⏳ Too short for the price
- 🤏 Very short game length
- 📉 Anticlimactic ending
- 💸 Not worth the cost
- 🤔 Puzzles too easy

**Reported bugs**

- Gold nub missing from mapping desk
- Scales string and key string not working
- Bugs requiring restarts
- Bookshelf puzzle unplayable
- Puzzles not working/broken

**Requested features**

- More content/longer game
- Sequels or more chapters
- More impactful choices
- Full-fledged multi-room game


## Frequently asked questions

### Is Causality free?

Causality costs $1.99, with no in-app purchases.

### Is Ada's Study free?

Ada's Study costs $0.99, with no in-app purchases.

### Which has better reviews, Causality or Ada's Study?

Causality is rated higher. Causality averages 4.4 out of 5 from 185 ratings, while Ada's Study averages 3.6 from 35 ratings.

### Do Causality or Ada's Study have ads?

Neither Causality nor Ada's Study shows ads.

### Which is updated more often, Causality or Ada's Study?

Causality ships an update every 3 months, and Ada's Study every 2 weeks. Most recently, Causality was updated on October 1, 2026 and Ada's Study on October 3, 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.*