Comparison

Midnight Castle vs BioDecoder

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

Midnight Castle

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
Read full description

A dark mystery full of hidden objects is here! Adventure beyond the gates of a mysterious castle to discover a story rich with enchantment and thrilling secrets. Explore what lurks in the Mystery Chamber and save the fate of the Midnight Castle! • STUNNING VISUALS AND SPOOKY CHARACTERS! Meet a new character in every scene! From the beautiful royalty, to menacing dragons and trolls, experience a world of wonder! Your quest will lead you through dark passages and down illuminated paths! • PLAY FOR FREE! Start searching for magical items now! Unveil mysterious treasures and use your coins and diamonds to unlock more fantastic locations. Stock up your inventory, or sell glorious relics for more currency! Want to speed up your journey? Coins and diamonds are always available for purchase. • CRAFT INCREDIBLE ITEMS TO HELP YOUR QUEST! Use items you find on the castle grounds to craft exquisite relics, potions, and poisons! Craft as many as you can and be rewarded each time! • ENJOY THE FANTASY WITH YOUR FRIENDS! Play with all your friends, even sign in with Facebook! Share gifts and wish lists, and help your friends get items they need to move on. Now it pays to connect! The more friends you have, the more gifts you will have to open! Follow the adventure on Facebook! Stay connected for exciting news and details on the story! https://www.facebook.com/midnightcastle Please Note: Midnight Castle currently supports iPhone 4S or above, iPad Air, and iPad 2 or above, running iOS 8 or above. ************************************************** Mama56 by Mamaloveydove This, by far, has been the most entertaining and fun game I have played. Not complicated and brings a sense of accomplishment as you achieve more and open new hidden object sites. Thank you . This sure beats housework :) Midnight Castle Review by Big mama jessie A very fun game! Lots of mini-games with hidden objects to fine. Lots of imagination and fine artistry in the scenes and objects found. Love it!! Midnight castle by Northern will This is an amazing game to use your eyes and memory to find objects and progress to the next level. Lots of fun!

About

BioDecoder

Features
Read full description

Enter the world of BioDecoder, a thrilling puzzle experience where logic, memory, and deduction are your greatest weapons. Humanity’s future is on the line – a mysterious code holds the key to survival, and only you can break it. Your mission is simple to explain but challenging to master: uncover the correct sequence before time runs out. Each guess brings you closer to the solution, but also tests your ability to think ahead, eliminate possibilities, and adapt to new challenges. With multiple difficulty levels – from relaxed brain-teasing to extreme code-breaking – BioDecoder is designed for both casual players and true puzzle veterans. Every level offers a fresh challenge, ensuring the game stays engaging no matter how many times you play. Features: • Engaging code-breaking gameplay inspired by timeless classics, with a modern twist. • Four difficulty levels: Beginner, Medium, Hard, and Extreme. • Stylish, clean interface for an intuitive and immersive experience. • Built-in haptic feedback for a tactile feel to every action. • Play at your own pace or race against the clock in timed modes. Whether you have a few minutes to spare or want to sink into an intense puzzle session, BioDecoder offers the perfect mental workout. Can you crack the code and save humanity?

Screenshots

Midnight Castle4 screens
BioDecoder3 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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

Scorecard4 real differences · 6 level
Midnight Castle versus BioDecoder: the parameters behind the verdict, then further details
ParameterMidnight CastleBioDecoder
PriceFreeFree
Rating4.4 (4.7K ratings) — better—
Positive reviews68.4% of reviews—
Number of ratings4.7K — better—
Update frequencyEvery 2 monthsFortnightly — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13.0 — better18.5
Further details — not scored
Size134 MB2 MB
Age rating4+12+
DeveloperBFG Entertainment Inc.Richard Magney

Bugs and requests

Midnight Castle

Reported bugs

4 issues
  • 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

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

BioDecoder

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

Midnight Castle

One-time10
  • Clue of Diamonds$0.99
  • Pile of Diamonds$1.99
  • Case of Coins$2.99
Show 7 more
  • Case of Diamonds$4.99
  • Vault of Coins$7.99
  • Vault of Diamonds$9.99
  • Moat of Coins$14.99
  • Moat of Diamonds$19.99
  • Mansion of Coins!$29.99
  • Mansion of Diamonds$39.99
3 purchases

BioDecoder

One-time3
  • Small Tip$0.99
  • Medium Tip$3.99
  • Large Tip$8.99

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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