# SPHINX By Skolera vs BoldStep.ai

The clearest difference is in-app purchases: SPHINX By Skolera at none against BoldStep.ai's 6. SPHINX By Skolera also leads on iOS requirement (15.1 vs 17.0). BoldStep.ai's advantage is update cadence (every 6 weeks vs every 13 months). On price, ads and device support there is nothing between them.

Both are free to download. BoldStep.ai sells 6 in-app purchases, starting at $56.99 per year. SPHINX By Skolera asks for nothing beyond the download.

SPHINX By Skolera ships an update every 13 months, BoldStep.ai every 6 weeks. Both last shipped on October 25, 2026.

## The numbers

| Metric | SPHINX By Skolera | BoldStep.ai |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 6 weeks** |
| Size | 18 MB | 25 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Skolera ULP](https://appshunter.io/developer/1346646109) | [Omar Barkat](https://appshunter.io/developer/1799793902) |

## What reviewers say

### SPHINX By Skolera

[App page](https://appshunter.io/ios/app/sphinx-by-skolera/id6736607978)

**Features:** macOS Compatibility

**In-app purchases:** none


### BoldStep.ai

[App page](https://appshunter.io/ios/app/boldstepai/id6753924032)

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Custom Subject | $56.99 | per year |
| Recommended Course | $69.99 | per 3 months |
| Basic | $99.99 | per year |
| Annual Package | $559.99 | per year |
| Sustom Subject subscription | $199.00 | one-time |
| Basic | $359.99 | one-time |


## Frequently asked questions

### Is SPHINX By Skolera free?

SPHINX By Skolera is free to download, with no in-app purchases.

### Is BoldStep.ai free?

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

### Do SPHINX By Skolera or BoldStep.ai have ads?

Neither SPHINX By Skolera nor BoldStep.ai shows ads.

### Which is updated more often, SPHINX By Skolera or BoldStep.ai?

SPHINX By Skolera ships an update every 13 months, and BoldStep.ai every 6 weeks. Most recently, SPHINX By Skolera was updated on October 25, 2026 and BoldStep.ai on October 25, 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.*