Comparison

On vs Vampire Story

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

Head to head
About

On

Challenge your mind with this classic number puzzle. Solve nine-by-nine grids with adjustable difficulty and helpful tools like error checking and pencil marking. Enjoy endless unique puzzles and track your progress.

Highlights
  • Randomly generated puzzles
  • Three difficulty levels plus custom
  • Error checking
  • Annotations (pencil marking)
  • Undo/Redo moves
  • Auto-save functionality
  • Custom game input
Features
Read full description

Challenge you brain! On-Core Sudoku: consists of a nine-by-nine grid with 9 inner squares. To solve Sudoku each inner square must have one of the numbers between 1 and 9. Each row and column must contain each number once. It features error checking, annotations (pencil marking), undo move(s) and more. On-Core Sudoku features: - Games are generated randomly so you will never play the same game twice. - The game has three difficulty levels: Easy, Medium and Hard plus a Custom option for custom games. - Each difficulty level has it's own timer so you can try to beat your best time at each level. - The game auto-saves so that you can return to it at any time. - Generate Symmetric or Non-Symmetric puzzles. - Error checking to show invalid entered numbers. - Annotate (pencil mark) a tile with one or more numbers. - Unlimited Undo or Redo moves. - Autofill option to automatically fill in all the possible annotations. - Option to enter custom games from sources such as newspapers, puzzle books, websites, etc. - Wirelessly send or receive custom games, via a local WiFi connection, to a friend or family member who also has Game Pack Volume 1 or On-Core Sudoku. - Sound effects can be turned on or off. - No internet connection is required because the games are on your iPhone or iPod Touch.

About

Vampire Story

Embark on a thrilling quest to escape an ancient vampire's clutches by solving intricate puzzles and uncovering hidden objects. Explore vibrant 360-degree scenes, collect bonuses for speed, and assemble a powerful amulet to defeat the evil.

Highlights
  • 360-degree panoramic scenes
  • Hidden object search
  • Collect bonuses for speed
  • Assemble a powerful amulet
  • 3D visual effects
  • Replay quests for new rewards
Features
Read full description

- What can be more exciting than playing with the Evil? If I win you’ll be my dinner. If lady fortune turns her face from me, a mystery will be unveiled. A heroine of this mysterious game got enslaved by the ancient vampire. Help her to complete a sophisticated quest, set by the blasé monster to entertain himself. Solve the vampire’s castle secrets, find the way out, overcome the obstacles on your way to the holy place and put together a powerful amulet to defeat the Evil… Colorful 360-degree scenery, animation, and 3D visual effects will make your adventure vivid and fun. Those with a competitive streak can collect bonuses for speed and repeat the quest with new puzzles. Game features: - Look for items in 360-degree panoramic scenes - Look behind objects! Your clues may be hidden there. - Build your collection. Go through scenes again to try new quests and get new rewards! The game is TRULY FREE, the whole adventure is open to you without any additional purchases - it's entirely up to you to buy optional tools. We'll be happy to stay in touch with you at www.facebook.com/CrispApp - make comments, ask questions, get news about coming games!

Screenshots

On4 screens
Vampire Story4 screens

Verdict

The call

The clearest difference is review sentiment: Vampire Story at 84% against On's 0%. Vampire Story also leads on price (Free vs $0.99) and ratings volume (3.3K vs 1). On's advantage is in-app purchases (none vs 6) and ads (none vs shown). On device support 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

Vampire Story is free to download; On costs $0.99 up front. Vampire Story sells 6 one-off in-app purchases. On asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Vampire Story has 3.3K ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 0% of On's written reviews are positive against 84% of Vampire Story's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

On ships an update every 25 months, Vampire Story every 7 months. The most recent releases landed on October 24, 2026 and November 2, 2026 respectively.

Scorecard9 real differences · 1 level
On versus Vampire Story: the parameters behind the verdict, then further details
ParameterOnVampire Story
Price$0.99Free — better
Rating5.0 (1 ratings) — better4.6 (3.3K ratings)
Positive reviews0.0% of reviews83.8% of reviews — better
Number of ratings13.3K — better
Update frequencyEvery 25 monthsEvery 7 months — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS9.0 — better13.4
Further details — not scored
Size11 MB184 MB
Age rating4+9+
DeveloperOn-Core Software LLCCrisp App Studio

Customer experience

On

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Vampire Story

All ratings3,264 ratings
Positive90.4%
Neutral6.3%
Negative3.3%
Written reviews197 reviews
Positive83.8%
Neutral8.6%
Negative7.6%

Bugs and requests

On

Not enough reviews yet to summarise bugs or requests.

Vampire Story

Reported bugs

3 issues
  • Puzzles not registering correctly
  • Game freezing or crashing
  • Compatibility issues on older devices

Requested features

4 requests
  • Add more levels and castles
  • Ability to start over from the beginning
  • Clearer progression and level completion indicators
  • Expand the storyline and vampire theme

In-app purchases

None

On

No in-app purchases

6 purchases

Vampire Story

One-time6
  • Hidden Object Instant Hint$0.99
  • Hidden Objects : Preview Hints$0.99
  • Seek and Find Time Machine$0.99
Show 3 more
  • No Ads for iPad and iPhone$1.99
  • Gold Master Special$1.99
  • Master Pack: All-included$3.99

Questions

Is On free?
On costs $0.99, with no in-app purchases.
Is Vampire Story free?
Vampire Story is free to download, with in-app purchases available.
Which has better reviews, On or Vampire Story?
On is rated higher. On averages 5.0 out of 5 from 1 ratings, while Vampire Story averages 4.6 from 3.3K ratings.
Do On or Vampire Story have ads?
Vampire Story shows ads; On does not.
Which is updated more often, On or Vampire Story?
On ships an update every 25 months, and Vampire Story every 7 months. Most recently, On was updated on October 24, 2026 and Vampire Story on November 2, 2026.

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