# Void Soul vs MentalCalculation & Abacus Pro

The clearest difference is review sentiment: Void Soul at 100% against MentalCalculation & Abacus Pro's 0%. Void Soul also leads on price (Free vs $0.99). MentalCalculation & Abacus Pro's advantage is in-app purchases (none vs 14). On update cadence, ads, device support and iOS requirement there is nothing between them.

Void Soul is free to download; MentalCalculation & Abacus Pro costs $0.99 up front. Void Soul sells 13 one-off in-app purchases. MentalCalculation & Abacus Pro asks for nothing beyond the download.

Void Soul ships an update every 4 weeks, MentalCalculation & Abacus Pro monthly. The most recent releases landed on October 24, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | Void Soul | MentalCalculation & Abacus Pro |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.9 (9 ratings)](https://appshunter.io/ios/app/void-soul/id1616807619/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 4 weeks** | Monthly |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 1.6 GB | 144 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [OWLOGUE Co., Ltd.](https://appshunter.io/developer/513801174) | [Park Jisang](https://appshunter.io/developer/995438886) |

## What reviewers say

### Void Soul

[App page](https://appshunter.io/ios/app/void-soul/id1616807619)

Embark on a steampunk fantasy adventure filled with revenge and longing. Explore diverse locations, engage in puzzle-based battles, and uncover a story of love, revenge, and madness with charming characters.

**Highlights:** Steampunk fantasy narrative, Dot graphic exploration, Puzzle-based battles, Luxurious voice acting, Character-driven story, Visual novel elements

**Features:** macOS Compatibility

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy Story 2 | $1.49 | one-time |
| Buy Story 3 | $2.49 | one-time |
| Buy Story 4 | $3.39 | one-time |
| Buy Story 5 | $3.39 | one-time |
| Extra story package1 | $6.89 | one-time |
| Extra story package2 | $6.89 | one-time |
| Extra story package3 | $7.69 | one-time |
| Buy all remaining stories | $12.49 | one-time |
| Buy all remaining stories | $13.49 | one-time |
| Buy all remaining stories | $14.49 | one-time |
| Buy all remaining stories | $20.49 | one-time |
| Buy all remaining stories | $21.49 | one-time |
| Buy all remaining stories | $21.99 | one-time |


### MentalCalculation & Abacus Pro

[App page](https://appshunter.io/ios/app/mentalcalculation-and-abacus-pro/id6474296462)

Engage in a fun and challenging mental calculation and abacus game. Practice with diverse questions and learn the abacus with an easy tutorial. This pro version offers an enhanced experience without frequent forced ads.

**Highlights:** Mental calculation practice, Abacus learning tutorial, Variety of practice questions, Pro version benefits, No forced ads

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

**In-app purchases:** none


## Frequently asked questions

### Is Void Soul free?

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

### Is MentalCalculation & Abacus Pro free?

MentalCalculation & Abacus Pro costs $0.99, with no in-app purchases.

### Do Void Soul or MentalCalculation & Abacus Pro have ads?

Both Void Soul and MentalCalculation & Abacus Pro show ads.

### Which is updated more often, Void Soul or MentalCalculation & Abacus Pro?

Void Soul ships an update every 4 weeks, and MentalCalculation & Abacus Pro monthly. Most recently, Void Soul was updated on October 24, 2026 and MentalCalculation & Abacus Pro on October 23, 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.*