# OffClock vs STP One

The clearest difference is in-app purchases: OffClock at none against STP One's 2. STP One's advantage is update cadence (every 3 days vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. STP One sells 2 in-app purchases, starting at $9.99 per month. OffClock asks for nothing beyond the download.

OffClock ships an update every 2 months, STP One every 3 days. The most recent releases landed on September 30, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | OffClock | STP One |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 days** |
| Size | 3 MB | 13 MB |
| Requires iOS | 17.0 | **16.4** |
| Devices | iPhone, Apple Watch | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Benjamin Pichel](https://appshunter.io/developer/1896661528) | [JAEYUN HWANG](https://appshunter.io/developer/6799562363) |

## What reviewers say

### OffClock

[App page](https://appshunter.io/ios/app/offclock/id6779397895)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### STP One

[App page](https://appshunter.io/ios/app/stp-one-step-cad-viewer/id6802912144)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 스텝원 Pro 월간 | $9.99 | per month |
| 스텝원 Pro 연간 | $69.99 | per year |


## Frequently asked questions

### Is OffClock free?

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

### Is STP One free?

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

### Do OffClock or STP One have ads?

Neither OffClock nor STP One shows ads.

### Which is updated more often, OffClock or STP One?

OffClock ships an update every 2 months, and STP One every 3 days. Most recently, OffClock was updated on September 30, 2026 and STP One on October 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.*