# Convexity vs Hipocampus

Convexity and Hipocampus are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Convexity sells 2 in-app purchases, starting at $9.99 per month and Hipocampus sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Convexity ships an update every 3 months, Hipocampus every 2 months. The most recent releases landed on September 15, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Convexity | Hipocampus |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Size | 7 MB | 3 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Joshua Rudland-Potter](https://appshunter.io/developer/1877061292) | [Mitaanshu Agarwal](https://appshunter.io/developer/1896724075) |

## What reviewers say

### Convexity

[App page](https://appshunter.io/ios/app/convexity-cfa-exam-prep/id6760819111)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pro | $9.99 | per month |
| Annual Pro | $89.99 | per year |


### Hipocampus

[App page](https://appshunter.io/ios/app/hipocampus/id6772046372)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hipocampus Pro Monthly | $2.99 | per month |
| Hipocampus Pro Yearly | $19.99 | per year |
| Hipocampus Pro Lifetime | $199.99 | one-time |


## Frequently asked questions

### Is Convexity free?

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

### Is Hipocampus free?

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

### Do Convexity or Hipocampus have ads?

Neither Convexity nor Hipocampus shows ads.

### Which is updated more often, Convexity or Hipocampus?

Convexity ships an update every 3 months, and Hipocampus every 2 months. Most recently, Convexity was updated on September 15, 2026 and Hipocampus on September 22, 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.*