# Olern vs O

The clearest difference is in-app purchases: O at none against Olern's 20. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Olern sells 20 one-off in-app purchases. O asks for nothing beyond the download.

Olern ships an update every 2 weeks, O fortnightly. Both last shipped on September 17, 2026.

## The numbers

| Metric | Olern | O |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Fortnightly** |
| Size | 63 MB | 68 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MobileOptima, Inc.](https://appshunter.io/developer/544651843) | [mohamed elhendy](https://appshunter.io/developer/1848572319) |

## What reviewers say

### Olern

[App page](https://appshunter.io/ios/app/olern/id6451106609)

**Features:** macOS Compatibility

**In-app purchases (20)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Wildlife and Conservation | $0.99 | one-time |
| Environmental Science and C... | $0.99 | one-time |
| FMEA Method | $1.99 | one-time |
| Botany and Plant Sciences | $1.99 | one-time |
| Training Test 1 | $3.99 | one-time |
| Geology and Earth Sciences | $4.99 | one-time |
| Can I Franchise My Business? | $9.99 | one-time |
| Future Proof your Children | $9.99 | one-time |
| Safety Tips for a Happy Wor... | $9.99 | one-time |
| Embracing Technology: Tamin... | $9.99 | one-time |
| Effective Communication | $9.99 | one-time |
| Clutter-Free Mind at Work | $9.99 | one-time |
| Mentally Fit to Work | $9.99 | one-time |
| Emotional Safety 101 | $9.99 | one-time |
| Introduction to AI and ML | $9.99 | one-time |
| How to use the force? | $11.99 | one-time |
| Stress Management | $19.99 | one-time |
| Getting Back on Track: Hand... | $39.99 | one-time |
| How To Set the Right KPIs f... | $39.99 | one-time |
| Strategic Management: Craft... | $49.99 | one-time |


### O

[App page](https://appshunter.io/ios/app/o-learn/id6754511188)

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

**In-app purchases:** none


## Frequently asked questions

### Is Olern free?

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

### Is O free?

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

### Do Olern or O have ads?

Neither Olern nor O shows ads.

### Which is updated more often, Olern or O?

Olern ships an update every 2 weeks, and O fortnightly. Most recently, Olern was updated on September 17, 2026 and O on September 17, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*