# IFSTA ResourceOne vs DO Calcs Buddy

The clearest difference is update cadence: DO Calcs Buddy at monthly against IFSTA ResourceOne's every 5 months. DO Calcs Buddy also leads on ratings volume (4 vs 1). IFSTA ResourceOne's advantage is rating (5.0 vs 4.8). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

IFSTA ResourceOne holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 1 and 4 respectively.

IFSTA ResourceOne ships an update every 5 months, DO Calcs Buddy monthly. The most recent releases landed on October 11, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | IFSTA ResourceOne | DO Calcs Buddy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ifsta-resourceone/id6749885476/reviews)** | [4.8 (4 ratings)](https://appshunter.io/ios/app/do-calcs-buddy/id6749918102/reviews) |
| Number of ratings | 1 | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Monthly** |
| Monetization | Free | Free |
| Size | 59 MB | 71 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [IFSTA](https://appshunter.io/developer/495289396) | [Max McCoy](https://appshunter.io/developer/1832824815) |

## What reviewers say

### IFSTA ResourceOne

[App page](https://appshunter.io/ios/app/ifsta-resourceone/id6749885476)

Access IFSTA's learning management system on your mobile device. Download courses for offline access and sync your progress in real-time. Stay engaged with push notifications for training materials designed for firefighters.

**Highlights:** Mobile access to LMS, Downloadable courses, Real-time progress syncing, Push notifications, Blended learning support, Instructor tools

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

**In-app purchases:** none


### DO Calcs Buddy

[App page](https://appshunter.io/ios/app/do-calcs-buddy/id6749918102)

This app helps firefighters and engineers perform hoseline calculations for training and certification. It offers customizable settings for specific departments and includes interactive study modes for various pump operator topics. The tool is designed for offline use and provides quick reference field topics.

**Highlights:** Hoseline Calculator with custom segments, Friction loss, PDP, GPM, Nozzle Reaction, Customizable hose and nozzle settings, Interactive study mode with randomized questions, Offline functionality, Quick reference field topics

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

**In-app purchases:** none


## Frequently asked questions

### Is IFSTA ResourceOne free?

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

### Is DO Calcs Buddy free?

DO Calcs Buddy is free to download, with no in-app purchases.

### Which has better reviews, IFSTA ResourceOne or DO Calcs Buddy?

IFSTA ResourceOne is rated higher. IFSTA ResourceOne averages 5.0 out of 5 from 1 ratings, while DO Calcs Buddy averages 4.8 from 4 ratings.

### Do IFSTA ResourceOne or DO Calcs Buddy have ads?

Neither IFSTA ResourceOne nor DO Calcs Buddy shows ads.

### Which is updated more often, IFSTA ResourceOne or DO Calcs Buddy?

IFSTA ResourceOne ships an update every 5 months, and DO Calcs Buddy monthly. Most recently, IFSTA ResourceOne was updated on October 11, 2026 and DO Calcs Buddy on October 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.*