Product Release Notes
CURRENT VERSIONS
- iOS : 2.1.1
- Android: 2.4.3
- Thermometer firmware: v2.2.1
- Display Firmware: v2.3.3
- Booster Firmware: v2.3.3
iOS app in the App Store
Android app on Google Play
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CURRENT VERSIONS
iOS app in the App Store
Android app on Google Play
This is to let you know what’s working well, what’s not (and what we’re doing about it), and what’s up next for Combustion tools.
We're always looking for ways to improve our products, and that doesn't stop when you get it.
Firmware updates (to the onboard software) are how we can make our products better and better over the life of the tool.
The Predictive Thermometer already is the most advanced cooking thermometer ever built (not exaggerating), and we’re not even done yet. Stick with us, you’ll see.
If you run into a snag, please check the help center.
If you don’t find the answer you need, email us.
The most important functions of the Predictive Thermometer are software-controlled — there's a remarkable amount of computing power stuffed in there. It makes all kinds of important calculations, including predictions.
The more cooking data we feed into our algorithm ( Predictive Engine), the better it gets. Our new Predictive Engine is better than the one from a month ago (and the next one will be even better).
It also means we can add new features like advanced cooking predictions, without having to rebuild anything. New firmware is like getting a free upgrade to your hardware.
You'll need the "Combustion Inc." app to apply firmware updates. Links to each are in the footer of this site.
Please update your tools one at a time (e.g. do the Predictive Thermometer first, then the Display).
First of all, you’ll probably see an “update” banner (or two) on the main screen. Tap it! Then let it happen. That’s all.
Otherwise, follow the usual steps:
NOTE: A Booster will not update if it's currently holding a Thermometer (that turns its radio off).
Troubles?
If the update does not complete, close the app and re-open it.
April 2025
Feb 2025
Jan 2025
(Dec 2024)
(July 2024)
(Mar 2024)
(Mar 2024)
(Jan 2024)
(Dec 2023)
Added USDA Food Safe (major feature) - enter protein and serving time, the CPT will automatically notify you (via the app) when your food reaches the USDA recommendations for food safety according to user-selected “simplified” (temp) or “integrated” (time at temps) standards.
(previously)
Changed "standby" behavior to support moisture-rich cooking scenarios like sous vide.
Thermometer will no longer immediately enter standby if placed in an unpowered charger.
Thermometer will immediately enter charging-mode/standby if placed in a powered charger or Booster.
Prior to this update, a thermometer would enter standby if the charging post (on the butt of thermometer) was shorted to the tube.
This could happen by accident if a conductive material (like water or meat juice) formed a bridge.
April 2025
Feb 2025
(Dec 2024)
(Dec 2023)
Sept 2023 Release Notes:
August 2023 Release Notes:
April 2025
Feb 2025
Dec 2024:
July 2024:
Mar 2024:
Dec 2023:
Sept 2023:
August 2023 Release Notes:
We pushed the limits of what is possible, and some of those limits pushed back. Real-world testing revealed some limitations in the physical product - stuff we didn’t discover until we had more people cooking with different appliances in a wider variety of different ways.
Some of these issues can be fixed, but some are bumping up against the laws of physics and thermodynamics and we just need to work around them.
Newest models (Summer 2023 or newer): 40-50 days standby
Other models (Before Summer 2023): 30 days standby
Early models (Dec 2022): 17 days standby
Any Predictive Thermometer in a Booster: up to 6 months standby
With early models, we discovered a power leak during standby mode, which cuts standby time down to two weeks (from four). It’s a small but significant leak.
The best answer for this problem is the Combustion Booster, released in Summer 2023. The Booster has its own battery (a strong one) that can maintain a thermometer in standby mode for up to 6 months. With a Booster, you know your thermometer is always ready to cook!
Without a Booster, charging up the thermometer after it’s been in the drawer a couple weeks is probably a good rule of thumb.
(Personally, I got in the habit of topping mine off with a 5 minute zap on any day I’m going to use it. Not ideal, but you probably won’t ever notice if you’re using it regularly. Edit - and now I have a Booster, so I don't even think about it.)
With software and hardware improvements, the next iteration of the Predictive Thermometer saw a significant increase in standby life.
The newest version of the Predictive Thermometer includes a new type of battery. It required a minor hardware adjustment, but made the battery last significantly longer in standby and during active cooking. Progress!
Rec-tec defeated us. Sort of.
(If you didn’t know, they’re a brand that builds grills that weigh about the same as a battleship.)
The thicker the metal, the more it blocks radio. Even a strong transmitter (like the one inside the Predictive Thermometer) inside a bomb-proof 10-gauge plate-metal enclosure is going to have signal issues.
A Predictive Thermometer inside one of these monster grills can get a weakened signal through – though reception depends on the proximity and orientation of the display.
We plan to release a set of universal rabbit ears that will mount to any smoker or grill (just kidding --- unless??).
For now, we sussed out a different way to make the most of mostly-blocked signals.
Thankfully, the Predictive Thermometer is doing the heavy calculations, so an intermittent connection is enough to keep your Display up-to-date.
And even though this ties your display closely to the grill, you'll be able to use it as a range-booster and track your progress on the app from much farther away.
Or you can use the Booster near that monster grill and place your Display where you normally would!
Either repeater gets you another 100m (330ft) of potential signal. So unless your bomb-proof grill is also in a bunker, you should be freed up a bit.
More about RF and Bluetooth and MeatNet on the main FAQ ("All about wireless").
Even if you don’t plan to cook using an app, you’ll need it in order to update your firmware (it’s bone-simple to do so, we promise).
The app shows you temperatures in and around your food, and let you know when your food will be done.
The apps also unlock an important feature of the Combustion Display (or Booster): the Range Extender. When using the display or booster + app, total BLE strength is best-in-class.
In non-ideal conditions, it's plenty strong for almost any set-up.
If that's not enough, you can use MeatNet™ Cloud to extend your range as far as the internet reaches.
You'll need to create an account in the app, in order to connect remotely and label your cook data (for later use by you!).
With this cloud sync service, you'll need either:
More details here.
We intentionally kept the app very streamlined. It won’t push ads or recipes or other content at you.
No fluff.
April 2025
--> These can be expanded so their most recent data can be accessed, reviewed and exported.
--> New “Edit & Identify” screen for reordering your probes and identifying which ones are nearby.
Feb 2025
Jan 2025
Dec 2024
Nov 2024
July 2024
Mar 2024 (1.8.3)
Mar 2024 (1.8.2)
(Jan 2024)(1.8.1)
(Dec 2023)(1.7.4)
(Dec 2023)(1.7.3)
(Sept 2023)
(August 22, 2023)
(July 13, 2023)
(May 12, 2023)
• Fixed memory leak that could cause the app to shut down in the background.
(May 08, 2023)
Release notes:
(April 19, 2023)
Release notes:
(March 4, 2023)
Release notes:
(Feb 10, 2023)
(Feb 06, 2023)
(Dec 23, 2022)
•Update firmware with minimal effort
•Set target (cooking to) temps
•View ambient, surface, and core temps
•Shows predictions
•Wander farther from the cooking area (see below)
When using the app, the display (timer) acts as a repeater – you can control and monitor your cook from another room, or across a small city park, or from a low-flying hot air balloon if necessary.
April 2025
Feb 2025
Jan 2025
Dec 2024
Nov 2024
July 2024
Mar 2024 (1.8.3)
Mar 2024 (1.8.2)
(Jan 2024)
(Dec 2023)
(Dec 2023)
(Nov 2023)
(October 2023)
(October 2023)
(September 2023)
(August 22, 2023)
(July 13, 2023)
(May 9, 2023)
Release notes:
Android v1.2.0
Android v1.1.0
Android v1.0.1
The Predictive Thermometer companion app lets you see the temperatures (core, surface, ambient) and predictions from your Predictive Thermometer, as well as set target temps, even from another room.
As long as your Combustion Display is within range, your app will function as a receiver and secondary display, extending the functional signal range - up to 300ft (90m). This is fabulous for those of us who live in old houses or decommissioned missile silos.
Another practical use is when you’re cooking inside some radio-resistant metal enclosure like a heavy-walled grill or smoker. No problem! Place the Display near the cook to relay the signal and keep tabs with the app from a goodly distance.
App Features:
Q: When will the app be available?
A: Now!
Q: Where?
A: In the App Store (iOS) and Google Play (Android). Links are in the footer.
Q: What’s it called?
A: The app name is “Combustion Inc.”
Q: Does it work on tablets as well?
A: Yes, indeed.
Q: I thought I didn't need a phone?
A: You don't need one to cook, that's up to you. But you will need one to upgrade firmware occasionally. Maybe borrow one from your kids? Or a neighbor kid?
All app and firmware updates are "backwards compatible" with the Predictive Thermometer you already own.
IN DEVELOPMENT:
• CARRYOVER PREDICTIONS: this is a toughie, but we haven't given up
• MULTIPLE TEMP ALERTS: nice for multi-step cooks like reverse sear or ambient temp oversight
NEWLY RELEASED IN 2024
• MeatNet™ Cloud: wifi to internet connectivity - watch your meat from anywhere; (July 2024)
• SafeCook™ food safety - easily guard your food against both bacteria and the horrors of overcooking! (July 2024)
• Low and Slow Mode - using the physics engine, we can now closely estimate stall duration/ready times during low heat cooking (smoking brisket for instance). (July 2024)
• PHYSICS-BASED PREDICTIVE ENGINE: predicts heat flow through your food and will allow for more complex secondary predictions. (Jan 2024)
FEATURES ADDED IN 2023:
• USDA SAFE: automatic notifications for when your food reaches USDA-recommended temps or time at temps (integrated mode). (Released Dec 2023)
• Multi-node MeatNet: use multiple tools together for absurd range (released! Summer 2023)
• Graphing: this is very cool and kind of hypnotic, trust me (released! April 2023)
• Data exports: track your cooking results (released! March 2023)
•Signal strength + management (multiple releases)
• Photo ID: label a cook-in-progress with a photo to distinguish between multiple thermometers (released Sept 2023)
You will find answers to questions you didn't even know you had on the main FAQ.
If you have other questions about cooking with the Predictive Thermometer, your best bet is to ask on our official subreddit. (Chris - our founder - watches this and often responds personally.)
Please write us if you have a problem or would like to report an issue. (support@combustion.inc)
Your feedback is super-important, it’s a big part of how we find ways to improve the product.
Thanks for taking the time, we really appreciate it.
Happy Cooking!