# BoltKit vs OpenAPI Viewer

The clearest difference is iOS requirement: OpenAPI Viewer at 18.1 against BoltKit's 26.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. BoltKit sells 1 one-off in-app purchase and OpenAPI Viewer sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

BoltKit ships an update every 3 weeks, OpenAPI Viewer every 2 weeks. The most recent releases landed on October 13, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | BoltKit | OpenAPI Viewer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Size | 1 MB | 13 MB |
| Requires iOS | 26.0 | **18.1** |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [PAUL SNYMAN](https://appshunter.io/developer/1877896729) | [Victor Manuel Puga Ruiz](https://appshunter.io/developer/1648773908) |

## What reviewers say

### BoltKit

[App page](https://appshunter.io/ios/app/boltkit/id6759829753)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| BoltKit Pro | $8.99 | one-time |


### OpenAPI Viewer

[App page](https://appshunter.io/ios/app/openapi-viewer/id6761346493)

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $1.99 | one-time |
| Medium Tip | $4.99 | one-time |
| Large Tip | $9.99 | one-time |


## Frequently asked questions

### Is BoltKit free?

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

### Is OpenAPI Viewer free?

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

### Do BoltKit or OpenAPI Viewer have ads?

Neither BoltKit nor OpenAPI Viewer shows ads.

### Which is updated more often, BoltKit or OpenAPI Viewer?

BoltKit ships an update every 3 weeks, and OpenAPI Viewer every 2 weeks. Most recently, BoltKit was updated on October 13, 2026 and OpenAPI Viewer on October 5, 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.*