# Roof Truss Calculator vs StudPlan

The clearest difference is update cadence: StudPlan at every 3 weeks against Roof Truss Calculator's every 53 months. Roof Truss Calculator's advantage is device support (3 vs 1) and iOS requirement (14.2 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Roof Truss Calculator sells 3 in-app purchases, starting at $0.99 per 7 days and StudPlan sells 4 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Roof Truss Calculator ships an update every 53 months, StudPlan every 3 weeks. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Roof Truss Calculator | StudPlan |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/roof-truss-calculator/id1590122098/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 53 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 2 MB | 4 MB |
| Requires iOS | **14.2** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Anna Filobok](https://appshunter.io/developer/1613515832) | [ZHENGQIAO JIANG](https://appshunter.io/developer/1892168889) |

## What reviewers say

### Roof Truss Calculator

[App page](https://appshunter.io/ios/app/roof-truss-calculator/id1590122098)

Instantly calculate the number of roof trusses needed for your project. Input roof length and spacing in various units to get a quick count. Streamline your construction planning with this efficient tool.

**Highlights:** Instant truss count calculation, Supports roof length and spacing input, Multiple unit support (meters, cm, inches, feet), Fast and efficient for construction planning, User-friendly interface

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Access | $0.99 | per 7 days |
| Premium Access | $1.99 | per month |
| Premium Access | $5.99 | per year |


### StudPlan

[App page](https://appshunter.io/ios/app/studplan-wall-framing-layout/id6769339554)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $1.99 | per 7 days |
| Monthly | $4.99 | per month |
| Yearly | $29.99 | per year |
| Lifetime | $79.99 | one-time |


## Frequently asked questions

### Is Roof Truss Calculator free?

Roof Truss Calculator is free to download, with in-app purchases available.

### Is StudPlan free?

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

### Do Roof Truss Calculator or StudPlan have ads?

Neither Roof Truss Calculator nor StudPlan shows ads.

### Which is updated more often, Roof Truss Calculator or StudPlan?

Roof Truss Calculator ships an update every 53 months, and StudPlan every 3 weeks. Most recently, Roof Truss Calculator was updated on November 3, 2026 and StudPlan on November 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.*