Sub vs Ion Blue
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
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.
- Remote plumbing system monitoring
- Flood and water damage alerts
- Customizable push notifications
- Multi-user access with permissions
- Support for multiple residences
- Cloud-enabled solutions
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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
Verdict
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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
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.
Sub ships an update every 5 weeks, Ion Blue every 2 months. Both last shipped on October 24, 2026.
| Parameter | Sub | Ion Blue |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (786 ratings) — better | 2.0 (8 ratings) |
| Positive reviews | 14.7% of reviews | 25.0% of reviews — better |
| Number of ratings | 786 — better | 8 |
| Update frequency | Every 5 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.5 | 15.5 |
| Further details — not scored | ||
| Size | 69 MB | 56 MB |
| Age rating | 4+ | 4+ |
| Developer | Sub-Zero and Wolf | Metropolitan Industries, Inc. |
Customer experience
Sub
Ion Blue
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
Sub
No in-app purchases
Ion Blue
No in-app purchases









