# Roof Guide vs 2FA Authenticator

The clearest difference is review sentiment: 2FA Authenticator at 100% against Roof Guide's 64%. 2FA Authenticator also leads on monetization model (free vs free with in-app purchases) and iOS requirement (17 vs 26.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Roof Guide sells 4 in-app purchases, starting at $1.99 per month and 2FA Authenticator sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Roof Guide ships an update every 2 weeks, 2FA Authenticator monthly. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Roof Guide | 2FA Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (19 ratings)](https://appshunter.io/ios/app/roof-guide-carpentry-calc/id920670842/reviews)** | — |
| Number of ratings | **19** | — |
| Positive reviews | 63.6% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Monthly |
| Monetization | Free with in-app purchases | **Free** |
| Size | 31 MB | 5 MB |
| Requires iOS | 26.0 | **17** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Infoguide Pty Ltd](https://appshunter.io/developer/920670841) | [Thomas Weschke](https://appshunter.io/developer/1866715497) |

## What reviewers say

### Roof Guide

[App page](https://appshunter.io/ios/app/roof-guide-carpentry-calc/id920670842)

This app provides specialized calculators for roofing, framing, decking, stairs, and concrete projects. It helps construction professionals estimate quantities, costs, and set out materials accurately using US or metric measurements.

**Highlights:** Roof framing calculations, Decking and flooring estimator, Stud wall setout and costing, Stair framing calculations, Concrete volume and cost estimator, Metric and imperial unit conversion

**Features:** Family Sharing, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $1.99 | per month |
| 6 Months | $7.99 | per 6 months |
| Annual | $12.99 | per year |
| Lifetime License | $29.99 | one-time |


### 2FA Authenticator

[App page](https://appshunter.io/ios/app/2fa-authenticator-trueauth/id6761183182)

This app securely manages verification codes for your online accounts. It generates one-time passwords (OTP) and keeps your data private with no tracking or external servers. Enjoy a fast, simple, and reliable authentication experience.

**Highlights:** Securely manage verification codes, Generate one-time passwords (OTP), Privacy-first experience with no tracking, Add accounts via QR code scanning, Offline-first functionality, Face ID/Touch ID protection

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TrueAuth Pro | $4.99 | one-time |


## Frequently asked questions

### Is Roof Guide free?

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

### Is 2FA Authenticator free?

2FA Authenticator is free to download, with in-app purchases available.

### Do Roof Guide or 2FA Authenticator have ads?

Neither Roof Guide nor 2FA Authenticator shows ads.

### Which is updated more often, Roof Guide or 2FA Authenticator?

Roof Guide ships an update every 2 weeks, and 2FA Authenticator monthly. Most recently, Roof Guide was updated on November 1, 2026 and 2FA Authenticator 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.*