# Principles vs DrawHelper Стелі

The clearest difference is in-app purchases: Principles at none against DrawHelper Стелі's 3. Principles also leads on update cadence (every 9 days vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. DrawHelper Стелі sells 3 in-app purchases, starting at $3.99 per month. Principles asks for nothing beyond the download.

Principles ships an update every 9 days, DrawHelper Стелі every 3 weeks. The most recent releases landed on October 25, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Principles | DrawHelper Стелі |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 3 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 47 MB | 85 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 17+ |
| Developer | [Bohdan Bats](https://appshunter.io/developer/1749778725) | [Yuliana Hura](https://appshunter.io/developer/1759568999) |

## What reviewers say

### Principles

[App page](https://appshunter.io/ios/app/principles-goals-habits-tasks/id6503646940)

**Features:** macOS Compatibility

**In-app purchases:** none


### DrawHelper Стелі

[App page](https://appshunter.io/ios/app/drawhelper/id6578453217)

This app helps professionals in the stretch ceiling industry quickly calculate room dimensions, material quantities, and lighting placements. It generates detailed reports and estimates for clients, streamlining the design and sales process.

**Highlights:** Sketch room layouts, Calculate material quantities, Plan lighting placement, Generate reports and estimates, Export drawings and calculations, Intuitive interface

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DrawHelper Ceiling | $3.99 | per month |
| DrawHelper Ceiling | $9.00 | per month |
| DrawHelper Ceiling | $90.00 | per year |


## Frequently asked questions

### Is Principles free?

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

### Is DrawHelper Стелі free?

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

### Do Principles or DrawHelper Стелі have ads?

Neither Principles nor DrawHelper Стелі shows ads.

### Which is updated more often, Principles or DrawHelper Стелі?

Principles ships an update every 9 days, and DrawHelper Стелі every 3 weeks. Most recently, Principles was updated on October 25, 2026 and DrawHelper Стелі on November 4, 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.*