# Stairstep vs Evthi

The clearest difference is price: Stairstep at Free against Evthi's $2.99. Evthi's advantage is update cadence (every 9 days vs monthly) and chart position (#185 vs unranked). On ads, in-app purchases and device support there is nothing between them.

Stairstep is free to download; Evthi costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Stairstep ships an update monthly, Evthi every 9 days. The most recent releases landed on October 31, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Stairstep | Evthi |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/stairstep/id6781493653/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 9 days** |
| Monetization | Free | — |
| Best chart rank | — | **#185** |
| Size | 23 MB | 54 MB |
| Requires iOS | 26.0 | **15.5** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Twarge LLC](https://appshunter.io/developer/6781456673) | [MERVE CAFEROGLU](https://appshunter.io/developer/6819098307) |

## What reviewers say

### Stairstep

[App page](https://appshunter.io/ios/app/stairstep/id6781493653)

View and inspect 3D models in STEP file format. Explore models with intuitive orbit, pan, and zoom controls, aided by a reference grid and scale bar. Access detailed geometry information including vertices, triangles, and dimensions.

**Highlights:** 3D model viewing, Orbit, pan, and zoom controls, Reference grid, Scale bar for size tracking, Geometry inspector, Dimension reporting

**Features:** Vision Pro support

**In-app purchases:** none


### Evthi

[App page](https://appshunter.io/ios/app/evthi-notes-money-and-docs/id6819098305)

**Currently charting:** #185 Top Paid · Productivity (US App Store)

**In-app purchases:** none


## Frequently asked questions

### Is Stairstep free?

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

### Is Evthi free?

Evthi costs $2.99, with no in-app purchases.

### Do Stairstep or Evthi have ads?

Neither Stairstep nor Evthi shows ads.

### Which is updated more often, Stairstep or Evthi?

Stairstep ships an update monthly, and Evthi every 9 days. Most recently, Stairstep was updated on October 31, 2026 and Evthi on November 6, 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.*