On vs Vampire Story
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
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.
- Randomly generated puzzles
- Three difficulty levels plus custom
- Error checking
- Annotations (pencil marking)
- Undo/Redo moves
- Auto-save functionality
- Custom game input
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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.
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.
- 360-degree panoramic scenes
- Hidden object search
- Collect bonuses for speed
- Assemble a powerful amulet
- 3D visual effects
- Replay quests for new rewards
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- 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
Verdict
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
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.
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.
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.
| Parameter | On | Vampire Story |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 5.0 (1 ratings) — better | 4.6 (3.3K ratings) |
| Positive reviews | 0.0% of reviews | 83.8% of reviews — better |
| Number of ratings | 1 | 3.3K — better |
| Update frequency | Every 25 months | Every 7 months — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 9.0 — better | 13.4 |
| Further details — not scored | ||
| Size | 11 MB | 184 MB |
| Age rating | 4+ | 9+ |
| Developer | On-Core Software LLC | Crisp App Studio |
Customer experience
On
Vampire Story
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
On
No in-app purchases
Vampire Story
- Hidden Object Instant Hint$0.99
- Hidden Objects : Preview Hints$0.99
- Seek and Find Time Machine$0.99
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- No Ads for iPad and iPhone$1.99
- Gold Master Special$1.99
- Master Pack: All-included$3.99









