# Osmo Detective Agency vs Stack by Stack!

The clearest difference is ads: Osmo Detective Agency at none against Stack by Stack!'s shown. Stack by Stack!'s advantage is update cadence (every 4 days vs every 2 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Osmo Detective Agency ships an update every 2 months, Stack by Stack! every 4 days. The most recent releases landed on September 29, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Osmo Detective Agency | Stack by Stack! |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (471 ratings)](https://appshunter.io/ios/app/osmo-detective-agency/id1371607066/reviews)** | — |
| Number of ratings | **471** | — |
| Positive reviews | 64.4% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 4 days** |
| Monetization | Free with in-app purchases | — |
| Size | 631 MB | 94 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tangible Play](https://appshunter.io/developer/799157444) | [ByeongUk Choi](https://appshunter.io/developer/1872002178) |

## What reviewers say

### Osmo Detective Agency

[App page](https://appshunter.io/ios/app/osmo-detective-agency/id1371607066)

Become a world-traveling detective and solve mysteries using physical game pieces and your device. Explore diverse locations, find hidden clues, and develop critical thinking skills. This app offers an engaging, hands-on learning experience for aspiring investigators.

**Highlights:** Solve global mysteries, Search for hundreds of clues, Explore eight exciting maps, Learn geography and culture, Develop critical thinking, Hands-on play with physical pieces

**In-app purchases:** none

**What reviewers like**

- 🎮 Engaging and fun gameplay experience
- 📚 Educational content for children
- 🎯 Interactive learning with physical components
- 👨‍👩‍👧‍👦 Appeals to wide age range including adults
- 🌍 Interesting maps and locations

**What reviewers complain about**

- 🐛 Magnifying glass detection issues
- 📱 Compatibility problems with newer iOS versions
- ⏱️ Long loading times and connectivity issues
- 🎯 Strict map setup requirements
- ❌ No customer service or support

**Reported bugs**

- Magnifying glass fails to detect items consistently
- Game board not recognized by camera
- Auto-read text feature non-functional
- Osmo World connection drops frequently
- App crashes or fails to load

**Requested features**

- More maps and game content
- Additional chapters or cases
- Longer gameplay duration
- Wider camera mirror piece
- Improved magnifying glass stability


### Stack by Stack!

[App page](https://appshunter.io/ios/app/stack-by-stack/id6760553499)

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

**In-app purchases:** none


## Frequently asked questions

### Is Osmo Detective Agency free?

Osmo Detective Agency is free to download, with no in-app purchases.

### Is Stack by Stack! free?

Stack by Stack! is free to download, with no in-app purchases.

### Do Osmo Detective Agency or Stack by Stack! have ads?

Stack by Stack! shows ads; Osmo Detective Agency does not.

### Which is updated more often, Osmo Detective Agency or Stack by Stack!?

Osmo Detective Agency ships an update every 2 months, and Stack by Stack! every 4 days. Most recently, Osmo Detective Agency was updated on September 29, 2026 and Stack by Stack! on September 27, 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.*