# DeltaChess vs Shogi Lab

The clearest difference is price: Shogi Lab at Free against DeltaChess's $0.99. DeltaChess's advantage is ads (none vs shown) and iOS requirement (15.0 vs 17.6). On update cadence, in-app purchases and device support there is nothing between them.

Shogi Lab is free to download; DeltaChess costs $0.99 up front. DeltaChess sells 3 one-off in-app purchases and Shogi Lab sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

DeltaChess ships an update every 4 days, Shogi Lab every 3 days. Both last shipped on October 28, 2026.

## The numbers

| Metric | DeltaChess | Shogi Lab |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 days | **Every 3 days** |
| Monetization | — | Free with in-app purchases |
| Size | 156 MB | 82 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Sezgin Serin](https://appshunter.io/developer/1793997554) | [koji ozono](https://appshunter.io/developer/1826482515) |

## What reviewers say

### DeltaChess

[App page](https://appshunter.io/ios/app/deltachess/id6753863395)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Developer Tip – Small | $0.99 | one-time |
| Developer Tip – Medium | $9.99 | one-time |
| Developer Tip – Large | $99.99 | one-time |


### Shogi Lab

[App page](https://appshunter.io/ios/app/shogi-lab-sunfish-engine/id6757245157)

This shogi app offers a full-featured engine for analysis and gameplay. Enjoy intuitive controls, real-time evaluation during matches, and comprehensive game record replay. Play online with rankings or offline against adjustable CPU opponents.

**Highlights:** In-game analysis with real-time evaluation, Thinking time visualization, Key move detection, Game record replay and analysis, Online ranked matches, Adjustable CPU strength, Save and resume matches

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Shogi Lab Pro | $1.99 | one-time |


## Frequently asked questions

### Is DeltaChess free?

DeltaChess costs $0.99, and also offers in-app purchases.

### Is Shogi Lab free?

Shogi Lab is free to download, with in-app purchases available.

### Do DeltaChess or Shogi Lab have ads?

Shogi Lab shows ads; DeltaChess does not.

### Which is updated more often, DeltaChess or Shogi Lab?

DeltaChess ships an update every 4 days, and Shogi Lab every 3 days. Most recently, DeltaChess was updated on October 28, 2026 and Shogi Lab on October 28, 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.*