# My e'sphère by ESTACA vs 990prep

The clearest difference is in-app purchases: My e'sphère by ESTACA at none against 990prep's 2. 990prep's advantage is update cadence (every 3 months vs every 12 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 990prep sells 2 in-app purchases, starting at $44.99 per month. My e'sphère by ESTACA asks for nothing beyond the download.

My e'sphère by ESTACA ships an update every 12 months, 990prep every 3 months. The most recent releases landed on September 12, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | My e'sphère by ESTACA | 990prep |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 3 months** |
| Size | 45 MB | 78 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [estaca](https://appshunter.io/developer/1478643799) | [Justin De Sio](https://appshunter.io/developer/1881405592) |

## What reviewers say

### My e'sphère by ESTACA

[App page](https://appshunter.io/ios/app/my-esphere-by-estaca/id1478643800)

**Features:** macOS Compatibility

**In-app purchases:** none


### 990prep

[App page](https://appshunter.io/ios/app/990prep-toeic-training/id6759878981)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $44.99 | per month |
| Annual Premium | $89.99 | per year |


## Frequently asked questions

### Is My e'sphère by ESTACA free?

My e'sphère by ESTACA is free to download, with no in-app purchases.

### Is 990prep free?

990prep is free to download, with in-app purchases available.

### Do My e'sphère by ESTACA or 990prep have ads?

Neither My e'sphère by ESTACA nor 990prep shows ads.

### Which is updated more often, My e'sphère by ESTACA or 990prep?

My e'sphère by ESTACA ships an update every 12 months, and 990prep every 3 months. Most recently, My e'sphère by ESTACA was updated on September 12, 2026 and 990prep on September 10, 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.*