Brew Kettle vs FERMNTR
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Brew Kettle
Read full descriptionHide full description
Homebrewing beer can be a tricky business. Boiling your wort for the desired amount of time for your hop schedule, and also ending up at the correct specific gravity can be difficult. Most homebrewers don't worry about it, and usually end up compromising on their post-boil gravity or volume. Brew Kettle lets you hit your numbers every time. Brew Kettle tracks your actively boiling wort in real-time. It knows what is going on in your kettle simply by tracking the boil time and getting updated volume measurements from the brewer. If your kettle does not have a sight-glass, a calibrated mash paddle or spoon is enough to get an accurate volume during the boil. Once you start taking volume measurements, the app is able to tell you valuable information in real-time, like: current gravity; current volume; expected ETA to reach your desired final gravity; what your final gravity will actually be if you continue boiling for the desired boil time With this information at hand and updated in real-time, you can decide turn the heat up or down to ensure you boil for the right amount of time, and end up at the correct gravity and volume.
FERMNTR
This app helps homebrewers track their creations from recipe design to fermentation. It focuses on sensory aspects first, then fills in technical details, and integrates with brewing equipment for a streamlined process.
- Sensory-first recipe builder
- Guided brew day with timers
- Live Brewzilla integration
- Fermentation tracking (RAPT, TILT, manual)
- Dashboard for active batches
- Inventory management
- Push notifications
Read full descriptionHide full description
FERMNTR – Brew by taste, not numbers. FERMNTR is the app I wished existed when I started brewing. It now covers the whole brew — from sketching a recipe, to brew day, to fermentation, to what's left in your inventory — without feeling like a spreadsheet. Most recipe tools want you to think in grams and IBUs from minute one. FERMNTR lets you start with what you actually want the beer to taste like — the hop character, the malt backbone, the yeast personality — and fills in the numbers as you go. The stats are all there if you want them. They're just not in the way. Brew day shouldn't be a juggling act. Steps, timers, mash temps, and notes live on one screen. If you've got a Brewzilla, FERMNTR talks to it directly, so the temperature you see is the real one in the kettle. No more flipping between three apps with sticky fingers. And no more guessing what's happening in the fermenter. Connect your RAPT or TILT devices and watch gravity and temperature update in real time, or log readings by hand in a few seconds. Either way, you get clean charts and a dashboard that tells you, at a glance, which batches need attention and which are quietly doing their thing. There's a bonus for the lazy (and the forgetful): when a fermentation moves to its next step, FERMNTR can automatically retarget your temperature controller to match the plan. Fewer alarms, fewer "oops I forgot at 1am" moments. (Premium, compatible controller required.) Everything syncs across iPhone, iPad, Mac, and Apple Watch, with widgets so you can check a batch without even unlocking your phone. What's inside: • Sensory-first recipe builder with full stats under the hood • Guided brew day with timers, steps, and live Brewzilla integration • Fermentation tracking with RAPT, TILT, or quick manual logging • Dashboard for active batches and connected devices • Inventory so you actually know what's in the fermenter, the keg, and the cupboard • Detailed charts that don't need a manual • iPhone, iPad, and Apple Watch apps with widgets on all of them • Push notifications when fermentations change state (Premium) • Auto-retarget your temperature controller as steps progress (Premium, compatible hardware required) • iCloud sync, so your brews follow you • Supports Brewzilla (gen 4 with RAPT), RAPT pill, all RAPT temperature controllers (Like Temperature Controller, Fermentation Chamber, etc) and TILT. Recipe creation for Beer, and fermentation support for beer, cider, mead, wine, or anything else that bubbles. FERMNTR won't promise medal-winning beer — that part's still on you. But it'll make the rest of it a lot less stressful. End-User License Agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: Brew Kettle at none against FERMNTR's 3. Brew Kettle also leads on iOS requirement (16.2 vs 18.0). FERMNTR's advantage is device support (3 vs 1). On price and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. FERMNTR sells 3 in-app purchases, starting at $0.99 per month. Brew Kettle asks for nothing beyond the download.
| Parameter | Brew Kettle | FERMNTR |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | — | Weekly |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone | iPhone, iPad, Apple Watch — better |
| Requires iOS | 16.2 — better | 18.0 |
| Further details — not scored | ||
| Size | 2 MB | 74 MB |
| Age rating | 12+ | 12+ |
| Developer | Justin Berstler | FERMNTR HB |
In-app purchases
Brew Kettle
No in-app purchases
FERMNTR
- Monthly premium1 Month trial$0.991 Month
- Yearly premium$4.991 Year
- FERMNTR Lifetime Premium$24.99





