Comparison

Combustion Inc. vs Crustello

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Combustion Inc.

This app uses a wireless thermometer and a predictive engine to estimate exactly when your food will be ready. It graphs core, surface, and ambient temperatures in real-time, providing notifications for important cooking events and food safety parameters.

Highlights
  • Predictive cooking time estimates
  • Real-time core, surface, and ambient temperature graphing
  • Customizable target temperature settings
  • Advanced cooking alerts and notifications
  • Food safety parameter integration
  • Remote monitoring via MeatNet™ Cloud
  • Firmware updates for accessories
Features
Read full description

See (and graph!) exact temperatures throughout your food while it cooks. Know exactly when it will be done. View and graph core, surface, and ambient temps in real time. The wireless Predictive Thermometer was built to answer a simple but important question: when will my food be ready? Combustion’s Predictive Engine™ estimates exactly when that will be, using the data from 8 onboard sensors (the most of any cooking thermometer). Important firmware updates! The Combustion App includes the latest firmware updates for Predictive Thermometers and other Combustion Accessories including Boosters, Displays, Giant Grill Gauges and other forthcoming products. Firmware updates improve core functions including time-to-cook predictions, longer battery life, and can add new features. MeatNet™ Cloud – for functionally unlimited range! Use with WiFi Accessories or with a second mobile device to stream your cook data to the cloud. Watch your cook in real-time from anywhere with internet access. Live Activity/Apple Watch support. The Combustion App works with iOS as well as iPadOS and MacOS (M1 or newer). Includes Live Activity (Dynamic Island) display feature so you can watch key temps even when the app is in the background. So handy! Combustion App Features: – Set target temp: so that your food comes out just the way you want it – See predictions in relative time (“ready in” countdown) or in absolute “clock” time – See key temps in real-time: including TrueCore®, TrueSurface™, TrueAmbient™ – Get notifications for important cooking events with advanced alerts (ready alarm, 5-minute warning, disconnect alert, low battery notification) – Set SafeCook™ parameters (integrated food-safety) – Know exactly when your food is safe to eat – Set-up WiFi connectivity for Combustion WiFi accessories – Graph your food’s temperatures in real-time! – See (and graph) temperatures from all 8 sensors with Advanced Cooking Mode – Enables multi-node MeatNet™: use any combination of Combustion accessories to extend Bluetooth signal range + strength – Use with or without Combustion Display – Export cooking data - to fine-tune your technique – Update firmware: get better performance and new features for Combustion tools – Works with most cooking appliances and cookware types – Works with all kinds of foods and most cooking appliances - BBQ smokers, ovens, ranges, grills, and more - indoors and out. – Works with or without WiFi Get more consistent results with all your favorite foods: steak, pork chops, brisket, pork shoulder, roasts, turkey, whole chicken, ribs, fish, bread, and more. Advanced graphing on the Combustion App helps you visualize exactly how heat moves through your food. You will understand the relationship between ambient cook temps and surface temps. And how surface temps really control how long things take – and how evenly food cooks. It may shock you to find out the oven temp (or grill temp) you set is not the same as the food is actually experiencing! The Combustion Inc app puts all that knowledge in front of you – with instant feedback, so you’re not just cooking better, you’re also learning as you go. And learning has never been so delicious.

About

Crustello

This app helps bakers perfect their dough and sourdough starters by monitoring fermentation with real-time data, smart alerts, and historical analysis. It works with companion hardware to track rise, temperature, and activity, making baking more predictable and delicious.

Highlights
  • Track fermentation with real-time data
  • Receive smart alerts for peak rise and temperature
  • Monitor sourdough starter activity and feeding schedules
  • Log and analyze past baking sessions
  • Compare fermentation graphs for technique refinement
  • Utilize a smart calculator for precise baking plans
  • Connect and manage multiple sensors remotely
Features
Read full description

Crustello is the smart companion app for the Crustello Starter Kit and Proofing Kit — helping you perfect your dough, sourdough starter, and every stage of fermentation with real-time data, alerts, and insights. Whether you’re cultivating a thriving starter or proofing dough for bread, pizza, focaccia, or pastries, Crustello takes the guesswork out of fermentation by tracking the things that matter most: rise, temperature, activity, and timing. Get instant notifications, monitor your dough from anywhere, and follow guided steps designed to make every bake more predictable and more delicious. • Track Fermentation Monitor your dough with complete clarity. The Crustello app records fermentation and shows graphs for dough, bowl, and room temperature, giving you full information over every stage of proofing. • Smart Alerts Never miss the right moment again. Set smart alerts in the Crustello app to notify you when your dough reaches peak rise, when the temperature falls outside the range, or even at custom stages of fermentation. • Sourdough Tracking Crustello makes it easy to know your starter’s rhythm. The smart bowl measures its growth, and the app’s graphs reveal the perfect moment to feed or use it, ensuring you always add your starter at peak strength. • Log Your Feedings Log every sourdough feeding in the Crustello app, including the exact ratios of starter, flour, and water. This makes it easy to track your routine, stay consistent, and see how different methods affect your starter’s growth. • History & Analysis Keep a complete record of your baking journey. Every dough and sourdough session is saved in the Crustello app, with detailed graphs you can revisit anytime to learn from past bakes and improve. • Data & Comparison See how your methods evolve over time. The Crustello app lets you compare recordings by overlaying graphs, making it easy to spot differences, refine techniques, and achieve consistent results. • Smart Calculator Plan your bake with precision before you even start. Enter your flour, water, salt, oil, yeast, or starter amounts along with fermentation times, and let the Crustello app calculate everything for a smooth, accurate workflow. • Connect Your Sensor Pair the app with the Crustello Smart Sensor via Wi-Fi and monitor from anywhere — even when you’re not home. You can connect and manage multiple sensors at once. The Crustello app works hand-in-hand with our Proofing/Starter Bowls and our Smart Sensor to provide a complete experience that helps you track your dough and sourdough consistently.

Screenshots

Combustion Inc.4 screens
Crustello4 screens

Verdict

The call

The clearest difference is review sentiment: Combustion Inc. at 76% against Crustello's 0%. Combustion Inc. also leads on rating (4.7 vs 1.3) and ratings volume (1.9K vs 4). Crustello's advantage is update cadence (every 2 weeks vs every 6 weeks). On price, ads, in-app purchases and device support 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

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

Combustion Inc. holds the better App Store score, 4.7 against 1.3. That said, the two scores are not equally well evidenced: Combustion Inc. has 1.9K ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 76% of Combustion Inc.'s written reviews are positive against 0% of Crustello's.

UpkeepUpdate frequency

Combustion Inc. ships an update every 6 weeks, Crustello every 2 weeks. The most recent releases landed on November 7, 2026 and October 30, 2026 respectively.

Scorecard6 real differences · 4 level
Combustion Inc. versus Crustello: the parameters behind the verdict, then further details
ParameterCombustion Inc.Crustello
PriceFreeFree
Rating4.7 (1.9K ratings) — better1.3 (4 ratings)
Positive reviews76.3% of reviews — better0.0% of reviews
Number of ratings1.9K — better4
Update frequencyEvery 6 weeksEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterAd-supported
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.0 — better18.0
Further details — not scored
Size132 MB19 MB
Age rating4+4+
DeveloperCombustion Inc.RaceBox Motorsport Llc

Customer experience

Combustion Inc.

All ratings1,905 ratings
Positive93.8%
Neutral1.6%
Negative4.6%
Written reviews80 reviews
Positive76.3%
Neutral3.8%
Negative20.0%

Crustello

All ratings3 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Bugs and requests

Combustion Inc.

Reported bugs

5 issues
  • Thermometer disconnects during use
  • App unable to stop timer
  • Inaccurate temperature readings
  • App unable to find device
  • Firmware update issues

Requested features

5 requests
  • Cooking history and logging
  • Live status widget
  • Apple Watch and Dynamic Island support
  • Ambient temperature alerts
  • Customizable probe labeling

Crustello

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Combustion Inc.

No in-app purchases

None

Crustello

No in-app purchases

Questions

Is Combustion Inc. free?
Combustion Inc. is free to download, with no in-app purchases.
Is Crustello free?
Crustello is free to download, with no in-app purchases.
Which has better reviews, Combustion Inc. or Crustello?
Combustion Inc. is rated higher. Combustion Inc. averages 4.7 out of 5 from 1.9K ratings, while Crustello averages 1.3 from 4 ratings.
Do Combustion Inc. or Crustello have ads?
Neither Combustion Inc. nor Crustello shows ads.
Which is updated more often, Combustion Inc. or Crustello?
Combustion Inc. ships an update every 6 weeks, and Crustello every 2 weeks. Most recently, Combustion Inc. was updated on November 7, 2026 and Crustello on October 30, 2026.

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