# Material Estimator Calculator vs Flag Protocol

The clearest difference is rating: Material Estimator Calculator at 4.8 against Flag Protocol's 2.6. Material Estimator Calculator also leads on review sentiment (41% vs 0%) and ratings volume (3.1K vs 5). Flag Protocol's advantage is in-app purchases (none vs 9). On price, update cadence and ads there is nothing between them.

Both are free to download. Material Estimator Calculator sells 3 in-app purchases, starting at $3.99 per month. Flag Protocol asks for nothing beyond the download.

Material Estimator Calculator holds the better App Store score, 4.8 against 2.6. That said, the two scores are not equally well evidenced: Material Estimator Calculator has 3.1K ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 41% of Material Estimator Calculator's written reviews are positive against 0% of Flag Protocol's.

Material Estimator Calculator ships an update every 6 weeks, Flag Protocol every 2 months. The most recent releases landed on September 24, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Material Estimator Calculator | Flag Protocol |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (3.1K ratings)](https://appshunter.io/ios/app/material-estimator-calculator/id376071081/reviews)** | [2.6 (5 ratings)](https://appshunter.io/ios/app/flag-protocol/id6752128454/reviews) |
| Number of ratings | **3.1K** | 5 |
| Positive reviews | **41.4% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 57 MB | 14 MB |
| Requires iOS | **15.0** | 18.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 9+ | 4+ |
| Developer | [Calculated Industries](https://appshunter.io/developer/370406449) | [Curayt, LLC](https://appshunter.io/developer/1012363586) |

## What reviewers say

### Material Estimator Calculator

[App page](https://appshunter.io/ios/app/material-estimator-calculator/id376071081)

This app helps contractors and DIYers accurately estimate material costs and quantities for construction projects. It features dimensional measurement tools, unit conversions, and a material database to optimize budgeting and ordering.

**Highlights:** Precise cost and percentage calculations, Integrated material size database, Advanced dimensional measurement tools, Comprehensive unit conversion, Efficient material requirement determination, Board feet and cost estimation, Digital record keeping

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month Full Access | $3.99 | per month |
| 3 Months Full Access | $7.99 | per 3 months |
| 1 Year Full Access | $29.99 | per year |

**What reviewers like**

- 👍 Simple and easy to use
- 👍 Clean and intuitive interface
- 🚀 Extremely helpful for daily use
- 👍 Works as expected for over 12 years

**What reviewers complain about**

- 💰 Subscription model instead of one-time purchase
- 💰 Expensive compared to physical calculator
- 🔒 Requires internet connection to function
- 🐛 Crashes and bugs after recent updates

**Reported bugs**

- App crashes repeatedly on launch
- Subscription screen keeps appearing even after purchase

**Requested features**

- Landscape mode support
- Metric unit support
- Offline functionality


### Flag Protocol

[App page](https://appshunter.io/ios/app/flag-protocol/id6752128454)

This app provides up-to-date information on when to fly the US flag at full staff versus half staff. It's designed to be free and easy to use, ensuring you always display your flag correctly.

**Highlights:** Full staff vs. half staff guidance, Up-to-date flag display information, Easy setup, Free to use

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

**In-app purchases:** none


## Frequently asked questions

### Is Material Estimator Calculator free?

Material Estimator Calculator is free to download, with in-app purchases available.

### Is Flag Protocol free?

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

### Which has better reviews, Material Estimator Calculator or Flag Protocol?

Material Estimator Calculator is rated higher. Material Estimator Calculator averages 4.8 out of 5 from 3.1K ratings, while Flag Protocol averages 2.6 from 5 ratings.

### Do Material Estimator Calculator or Flag Protocol have ads?

Neither Material Estimator Calculator nor Flag Protocol shows ads.

### Which is updated more often, Material Estimator Calculator or Flag Protocol?

Material Estimator Calculator ships an update every 6 weeks, and Flag Protocol every 2 months. Most recently, Material Estimator Calculator was updated on September 24, 2026 and Flag Protocol on September 9, 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.*