# Midnight Castle vs BioDecoder

The clearest difference is ads: BioDecoder at none against Midnight Castle's shown. BioDecoder also leads on update cadence (fortnightly vs every 2 months). Midnight Castle's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 18.5). On price and in-app purchases there is nothing between them.

Both are free to download. Midnight Castle sells 10 one-off in-app purchases and BioDecoder sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Midnight Castle ships an update every 2 months, BioDecoder fortnightly. The most recent releases landed on October 18, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Midnight Castle | BioDecoder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (4.7K ratings)](https://appshunter.io/ios/app/midnight-castle-mystery-game/id815879892/reviews)** | — |
| Number of ratings | **4.7K** | — |
| Positive reviews | 68.4% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | Free with in-app purchases | — |
| Size | 134 MB | 2 MB |
| Requires iOS | **13.0** | 18.5 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [BFG Entertainment Inc.](https://appshunter.io/developer/1865983885) | [Richard Magney](https://appshunter.io/developer/1792734341) |

## What reviewers say

### Midnight Castle

[App page](https://appshunter.io/ios/app/midnight-castle-mystery-game/id815879892)

Embark on a dark mystery adventure within a magical castle. Solve hidden object puzzles, craft items, and uncover thrilling secrets. Play with friends and explore enchanting scenes filled with spooky characters.

**Highlights:** Hidden object puzzles, Castle exploration, Item crafting, Social play with friends, Stunning visuals, Mini-games

**Features:** Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Clue of Diamonds | $0.99 | one-time |
| Pile of Diamonds | $1.99 | one-time |
| Case of Coins | $2.99 | one-time |
| Case of Diamonds | $4.99 | one-time |
| Vault of Coins | $7.99 | one-time |
| Vault of Diamonds | $9.99 | one-time |
| Moat of Coins | $14.99 | one-time |
| Moat of Diamonds | $19.99 | one-time |
| Mansion of Coins! | $29.99 | one-time |
| Mansion of Diamonds | $39.99 | one-time |

**What reviewers like**

- 💎 Addictive gameplay
- 🎨 Beautiful graphics
- 🕰️ No pressure to play constantly
- 🆓 Free to play without spending money

**What reviewers complain about**

- 🕰️ Slow progression without spending money
- 🔁 Repetitive gameplay and scenes
- 🐛 Crashes and bugs after updates
- 🔍 Difficulty finding required items

**Reported bugs**

- Game freezes or crashes after updates
- Inability to download or install updates
- Loss of progress or game data after updates
- Disappearing or non-functional in-game items

**Requested features**

- More frequent updates with new content
- Faster progression for free-to-play players
- Improved event scheduling and rewards
- Better optimization to reduce crashes


### BioDecoder

[App page](https://appshunter.io/ios/app/biodecoder/id6749856010)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $0.99 | one-time |
| Medium Tip | $3.99 | one-time |
| Large Tip | $8.99 | one-time |


## Frequently asked questions

### Is Midnight Castle free?

Midnight Castle is free to download, with in-app purchases available.

### Is BioDecoder free?

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

### Do Midnight Castle or BioDecoder have ads?

Midnight Castle shows ads; BioDecoder does not.

### Which is updated more often, Midnight Castle or BioDecoder?

Midnight Castle ships an update every 2 months, and BioDecoder fortnightly. Most recently, Midnight Castle was updated on October 18, 2026 and BioDecoder on October 14, 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.*