# OptiAM vs SkillGrader

The clearest difference is update cadence: SkillGrader at fortnightly against OptiAM's every 3 months. OptiAM's advantage is iOS requirement (12.4 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

OptiAM ships an update every 3 months, SkillGrader fortnightly. The most recent releases landed on October 26, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | OptiAM | SkillGrader |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Size | 6 MB | 52 MB |
| Requires iOS | **12.4** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Andromeda Systems Inc.](https://appshunter.io/developer/1016968648) | [Heron Skill Systems Inc](https://appshunter.io/developer/1817509517) |

## What reviewers say

### OptiAM

[App page](https://appshunter.io/ios/app/optiam/id1276710132)

**Features:** macOS Compatibility

**In-app purchases:** none


### SkillGrader

[App page](https://appshunter.io/ios/app/skillgrader/id1438485986)

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

**In-app purchases:** none


## Frequently asked questions

### Is OptiAM free?

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

### Is SkillGrader free?

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

### Do OptiAM or SkillGrader have ads?

Neither OptiAM nor SkillGrader shows ads.

### Which is updated more often, OptiAM or SkillGrader?

OptiAM ships an update every 3 months, and SkillGrader fortnightly. Most recently, OptiAM was updated on October 26, 2026 and SkillGrader on October 29, 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.*