# 90초암산왕 vs Tomb Busters

The clearest difference is review sentiment: 90초암산왕 at 100% against Tomb Busters's 49%. 90초암산왕 also leads on in-app purchases (none vs 13). Tomb Busters's advantage is iOS requirement (13.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Tomb Busters sells 13 one-off in-app purchases. 90초암산왕 asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 4 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 90초암산왕 | Tomb Busters |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (1K ratings)](https://appshunter.io/ios/app/tomb-busters/id6755951087/reviews)** |
| Number of ratings | — | **1K** |
| Positive reviews | **100.0% of reviews** | 49.2% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 days | Every 4 days |
| Monetization | **Free** | Free with in-app purchases |
| Size | 59 MB | 944 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [HYUNWOO LEE](https://appshunter.io/developer/1592216709) | [Giant Network](https://appshunter.io/developer/1478410146) |

## What reviewers say

### 90초암산왕

[App page](https://appshunter.io/ios/app/90/id6695733334)

Challenge yourself to solve as many math problems as possible within 90 seconds. Improve your calculation speed and accuracy across various addition, subtraction, multiplication, and division games. Compete with others on leaderboards and share your scores.

**Highlights:** Timed math challenges, 17 game modes, Addition, subtraction, multiplication, division, Leaderboards, Score sharing, Brain training

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

**In-app purchases:** none


### Tomb Busters

[App page](https://appshunter.io/ios/app/tomb-busters/id6755951087)

Embark on a co-op horror extraction adventure on mobile with PC cross-play. Squad up to loot ancient ruins, escape terrifying creatures, and share hilarious moments with friends. Choose your role and customize your character for a unique experience in procedurally generated environments.

**Highlights:** Co-op horror extraction gameplay, Full PC cross-play, Proximity voice chat, 20+ unique monsters from folklore, Role-based character classes, Customizable character appearance, Randomized maps and dynamic conditions

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

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Aurion x 60 | $0.99 | one-time |
| Aurion x 180 | $2.99 | one-time |
| Farm Monthly Pass | $3.99 | one-time |
| Aurion x 300 | $4.99 | one-time |
| Luxury VIP | $9.99 | one-time |
| Aurion x 620 | $9.99 | one-time |
| Seasonal Mystic Box Upgrade Pack | $10.00 | one-time |
| Deluxe Mystic Box | $11.99 | one-time |
| Aurion x 1300 | $19.99 | one-time |
| Exalted Mystic Box | $21.99 | one-time |
| Aurion x 1980 | $29.99 | one-time |
| Aurion x 3330 | $49.99 | one-time |
| Aurion x 6680 | $99.99 | one-time |


## Frequently asked questions

### Is 90초암산왕 free?

90초암산왕 is free to download, with no in-app purchases.

### Is Tomb Busters free?

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

### Do 90초암산왕 or Tomb Busters have ads?

Neither 90초암산왕 nor Tomb Busters shows ads.

### Which is updated more often, 90초암산왕 or Tomb Busters?

90초암산왕 ships an update every 4 days, and Tomb Busters every 4 days. Most recently, 90초암산왕 was updated on October 30, 2026 and Tomb Busters on October 31, 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.*