# IFSTA Instructor 9 vs DO Calcs Buddy

The clearest difference is review sentiment: DO Calcs Buddy at 100% against IFSTA Instructor 9's 0%. DO Calcs Buddy also leads on rating (4.8 vs 3.2) and in-app purchases (none vs 2). IFSTA Instructor 9's advantage is ratings volume (17 vs 4) and iOS requirement (13.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. IFSTA Instructor 9 sells 2 one-off in-app purchases. DO Calcs Buddy asks for nothing beyond the download.

DO Calcs Buddy holds the better App Store score, 4.8 against 3.2. Both are backed by a comparable volume of ratings — 17 and 4 respectively. Written reviews point the same way: 0% of IFSTA Instructor 9's written reviews are positive against 100% of DO Calcs Buddy's.

IFSTA Instructor 9 ships an update every 10 months, DO Calcs Buddy monthly. The most recent releases landed on October 8, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | IFSTA Instructor 9 | DO Calcs Buddy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.2 (17 ratings)](https://appshunter.io/ios/app/ifsta-instructor-9/id1604765850/reviews) | **[4.8 (4 ratings)](https://appshunter.io/ios/app/do-calcs-buddy/id6749918102/reviews)** |
| Number of ratings | **17** | 4 |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 10 months | **Monthly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 124 MB | 71 MB |
| Requires iOS | **13.0** | 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 Instructor 9

[App page](https://appshunter.io/ios/app/ifsta-instructor-9/id1604765850)

This app provides instructor training for fire and emergency services professionals, aligning with NFPA 1041 standards. It includes free flashcards and access to the first chapter of the audiobook and exam prep, with full access available via in-app purchases.

**Highlights:** NFPA 1041 compliant instructor training, Flashcards for key terms and definitions, Exam preparation with 565 validated questions, Progress tracking for study sessions, Full audiobook narration with offline access, Chapter 1 free access for all features

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Exam Prep | $14.99 | one-time |
| Audiobook | $30.99 | one-time |


### 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 Instructor 9 free?

IFSTA Instructor 9 is free to download, with in-app purchases available.

### Is DO Calcs Buddy free?

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

### Which has better reviews, IFSTA Instructor 9 or DO Calcs Buddy?

DO Calcs Buddy is rated higher. IFSTA Instructor 9 averages 3.2 out of 5 from 17 ratings, while DO Calcs Buddy averages 4.8 from 4 ratings.

### Do IFSTA Instructor 9 or DO Calcs Buddy have ads?

Neither IFSTA Instructor 9 nor DO Calcs Buddy shows ads.

### Which is updated more often, IFSTA Instructor 9 or DO Calcs Buddy?

IFSTA Instructor 9 ships an update every 10 months, and DO Calcs Buddy monthly. Most recently, IFSTA Instructor 9 was updated on October 8, 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.*