# Chronograph vs Oktant

The clearest difference is update cadence: Oktant at fortnightly against Chronograph's every 16 months. Chronograph's advantage is iOS requirement (11.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Chronograph sells 3 one-off in-app purchases and Oktant sells 4 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Chronograph ships an update every 16 months, Oktant fortnightly. The most recent releases landed on October 3, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Chronograph | Oktant |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 16 months | **Fortnightly** |
| Size | 98 MB | 78 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [App Dev Academy Ltd.](https://appshunter.io/developer/1281918813) | [Oktant](https://appshunter.io/developer/1884849065) |

## What reviewers say

### Chronograph

[App page](https://appshunter.io/ios/app/chronograph/id1281918814)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium for 90 days | $5.99 | one-time |
| Premium for 180 days | $11.99 | one-time |
| Premium for 365 days | $23.99 | one-time |


### Oktant

[App page](https://appshunter.io/ios/app/oktant/id6760536966)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Navigator | $4.99 | per month |
| Annual Navigator | $24.99 | per year |
| Annual Founding User Navigator | $39.99 | per year |
| Lifetime Navigator | $59.99 | one-time |


## Frequently asked questions

### Is Chronograph free?

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

### Is Oktant free?

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

### Do Chronograph or Oktant have ads?

Neither Chronograph nor Oktant shows ads.

### Which is updated more often, Chronograph or Oktant?

Chronograph ships an update every 16 months, and Oktant fortnightly. Most recently, Chronograph was updated on October 3, 2026 and Oktant on October 8, 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.*