Comparison

Sub vs Ion Blue

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

Head to head
About

Sub

This app enhances your kitchen experience by guiding you through recipes from websites and a curated collection. It allows remote control and monitoring of Sub-Zero refrigeration, Cove dishwashing, and Wolf appliances, ensuring optimal performance and convenience.

Highlights
  • Guided cooking from online recipes
  • Chef-tested recipes optimized for Wolf appliances
  • Remote dishwasher control and monitoring
  • Refrigerator settings and alerts
  • Filter recipes by cooking mode
  • Bookmark and share recipes
Features
Read full description

Elevate your kitchen experience with the Sub-Zero Group Owner’s App. Connect your Wi-Fi-enabled appliances and enjoy greater control, personalized cooking, and now, integrated wine inventory management. • Build and manage your wine collection • Scan bottles to quickly add wines to your inventory • Track where each bottle is stored across locations • Organize your collection with filters, groups, and tags • View inventory history as wines are enjoyed over time • Enjoy a guided cooking experience with recipes tailored to your appliances • Set timers and view oven status directly from recipe steps • Monitor and control your appliances from anywhere • Receive notifications for appliance status, maintenance, and more The app also gives you powerful control over your Sub-Zero refrigeration and Cove dishwashing appliances. Start your dishwasher remotely, monitor cycles, and manage supplies Wine Inventory transforms a traditionally manual task into a simple, intuitive experience. Manage your collection, understand where your wines are stored, and stay connected to your kitchen in one place. Download now and get more from every Sub-Zero, Wolf, and Cove appliance.

About

Ion Blue

Monitor and manage your smart home plumbing system remotely. Receive custom alerts for potential issues like flooding or water damage, and grant access to trusted contacts for timely response. Ideal for homeowners and property managers seeking peace of mind.

Highlights
  • Remote plumbing system monitoring
  • Flood and water damage alerts
  • Customizable push notifications
  • Multi-user access with permissions
  • Support for multiple residences
  • Cloud-enabled solutions
Read full description

The Ion Blue app is the central location for the expanding smart home product selection from Ion Technologies. With cloud-enabled solutions that include the Ion+ Connect pump controller, users can avoid being caught off-guard from household plumbing-related issues such as flooding or water damage. Make timely response decisions to active threats and maintain household protection regardless of whereabouts. Remotely monitor detected operation and situational metrics for further analyzing anytime curiosity strikes. For hands-off peace of mind, push notifications can be custom set with specific parameters that alerts users only when probable threats or activities of interest are detected. Share accessibility with multiple users including household members, neighbors, or any trusted contact in close proximity, with added options for granting full or limited user permissions. Homeowners can oversee multiple residences including vacation houses, while property managers and emergency service contractors can keep track of multiple property commitments. Prepare day-to-day response coverage, plan ahead for vacation or extended travel, stay on-guard and better prepared to protect household property from unwelcome plumbing-related issues. For product selection, available purchasing and installation options, or additional app support, please visit our website at www.IonBlue.app.

Screenshots

Sub4 screens
Ion Blue4 screens

Verdict

The call

The clearest difference is rating: Sub at 4.4 against Ion Blue's 2.0. Sub also leads on ratings volume (786 vs 8). Ion Blue's advantage is monetization model (free vs ad-supported) and review sentiment (25% vs 15%). On price, update cadence, ads and in-app purchases 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

Sub holds the better App Store score, 4.4 against 2.0. That said, the two scores are not equally well evidenced: Sub has 786 ratings behind it against 8, so its average is the more settled of the two. Written reviews complicate that: 15% of Sub's written reviews are positive against 25% of Ion Blue's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Sub ships an update every 5 weeks, Ion Blue every 2 months. Both last shipped on October 24, 2026.

Scorecard4 real differences · 6 level
Sub versus Ion Blue: the parameters behind the verdict, then further details
ParameterSubIon Blue
PriceFreeFree
Rating4.4 (786 ratings) — better2.0 (8 ratings)
Positive reviews14.7% of reviews25.0% of reviews — better
Number of ratings786 — better8
Update frequencyEvery 5 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationAd-supportedFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.515.5
Further details — not scored
Size69 MB56 MB
Age rating4+4+
DeveloperSub-Zero and WolfMetropolitan Industries, Inc.

Customer experience

Sub

All ratings778 ratings
Positive85.1%
Neutral3.0%
Negative12.0%
Written reviews177 reviews
Positive14.7%
Neutral8.5%
Negative76.8%

Ion Blue

All ratings8 ratings
Positive25.0%
Neutral0.0%
Negative75.0%
Written reviews4 reviews
Positive25.0%
Neutral0.0%
Negative75.0%

Bugs and requests

Sub

Reported bugs

4 issues
  • App crashes after recent updates
  • Unable to log in or register account
  • Appliances disappear from the app
  • Firmware update failures brick appliances

Requested features

3 requests
  • Add support for Celsius temperature units
  • Provide real-time temperature and energy consumption data
  • Integrate with smart home platforms like Apple HomeKit

Ion Blue

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Sub

No in-app purchases

None

Ion Blue

No in-app purchases

Questions

Is Sub free?
Sub is free to download, with no in-app purchases.
Is Ion Blue free?
Ion Blue is free to download, with no in-app purchases.
Which has better reviews, Sub or Ion Blue?
Sub is rated higher. Sub averages 4.4 out of 5 from 786 ratings, while Ion Blue averages 2.0 from 8 ratings.
Do Sub or Ion Blue have ads?
Neither Sub nor Ion Blue shows ads.
Which is updated more often, Sub or Ion Blue?
Sub ships an update every 5 weeks, and Ion Blue every 2 months. Most recently, Sub was updated on October 24, 2026 and Ion Blue on October 24, 2026.

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