# SGS G21 vs PredKing

The clearest difference is in-app purchases: SGS G21 at none against PredKing's 4. SGS G21 also leads on ads (none vs shown) and update cadence (every 3 days vs every 3 months). PredKing's advantage is iOS requirement (12.0 vs 15.0). On price and device support there is nothing between them.

Both are free to download. PredKing sells 4 in-app purchases, starting at $3.99 per 7 days. SGS G21 asks for nothing beyond the download.

SGS G21 ships an update every 3 days, PredKing every 3 months. The most recent releases landed on September 17, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | SGS G21 | PredKing |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.2 (5 ratings)](https://appshunter.io/ios/app/predking/id6445845645/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 25.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 days** | Every 3 months |
| Monetization | — | Free with in-app purchases |
| Size | 64 MB | 30 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [SA21C co., Ltd.](https://appshunter.io/developer/1380778684) | [fatih inan](https://appshunter.io/developer/1517800747) |

## What reviewers say

### SGS G21

[App page](https://appshunter.io/ios/app/sgs-g21/id1471088550)

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

**In-app purchases:** none


### PredKing

[App page](https://appshunter.io/ios/app/predking/id6445845645)

This app uses artificial intelligence to provide daily football match analysis and predictions across hundreds of leagues. It offers statistical data, live insights, and personalized notes for users to enhance their own betting strategies.

**Highlights:** AI-based match analysis, Daily predictions for hundreds of leagues, Live match statistics and analysis, Formation, goal minutes, and odds analysis, Referee statistics, Personalized notes and favorites, In-match event notifications

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $3.99 | per 7 days |
| Monthly Subscription | $9.99 | per month |
| 3 Months Subscription | $17.99 | per 3 months |
| Yearly Subscription | $49.99 | per year |


## Frequently asked questions

### Is SGS G21 free?

SGS G21 is free to download, with no in-app purchases.

### Is PredKing free?

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

### Do SGS G21 or PredKing have ads?

PredKing shows ads; SGS G21 does not.

### Which is updated more often, SGS G21 or PredKing?

SGS G21 ships an update every 3 days, and PredKing every 3 months. Most recently, SGS G21 was updated on September 17, 2026 and PredKing on September 14, 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.*