# RememblyX vs STP One

The clearest difference is update cadence: STP One at every 3 days against RememblyX's every 4 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. RememblyX sells 2 in-app purchases, starting at $1.99 per month and STP One sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

RememblyX ships an update every 4 weeks, STP One every 3 days. The most recent releases landed on October 2, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | RememblyX | STP One |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 3 days** |
| Size | 58 MB | 13 MB |
| Requires iOS | 17.6 | **16.4** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Michael Stadler](https://appshunter.io/developer/1811773205) | [JAEYUN HWANG](https://appshunter.io/developer/6799562363) |

## What reviewers say

### RememblyX

[App page](https://appshunter.io/ios/app/rememblyx/id6745320722)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro  (1 Month) | $1.99 | per month |
| Premium  (1 Month) | $11.99 | per month |


### 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 RememblyX free?

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

### Is STP One free?

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

### Do RememblyX or STP One have ads?

Neither RememblyX nor STP One shows ads.

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

RememblyX ships an update every 4 weeks, and STP One every 3 days. Most recently, RememblyX was updated on October 2, 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.*