ViCare schedules can help lower hot-water costs by limiting unnecessary heating during hours when you don’t need it. The main limitation is compatibility: in the United States, ViCare works with supported Viessmann equipment, and its available controls depend on the installed boiler. Downloading the app won’t add scheduling to an unrelated water heater. Viessmann U.S.
For budget-conscious households, the best starting point is an existing system’s basic schedule. Savings depend on what that schedule changes—not simply on using an app.
How ViCare hot-water schedules work
“Domestic hot water,” usually shortened to DHW, means water for showers, sinks, and other household uses. A DHW time program sets periods when your system prepares hot water.
For example, the U.S. Vitodens 200-W B2HE manual describes tank heating as enabled within scheduled periods and disabled between them, with frost protection remaining active. It also documents a separate recirculation-pump schedule. These functions have installation restrictions, including exclusions for tanks controlled by a temperature switch such as an Aquastat. Vitodens 200-W operating instructions, page 18
The financial reasoning is straightforward: stored hot water loses heat even when nobody uses it. Those standby losses depend partly on water temperature and tank insulation. Allowing fewer unnecessary reheating periods may reduce losses, although reheating later still requires energy. Cutting scheduled hours in half therefore does not mean cutting your water-heating bill in half. U.S. Department of Energy
Tank heating and combi-boiler comfort are different
Check what your particular schedule controls:
- Boiler with a supported hot-water tank: The schedule can govern tank reheating.
- Vitodens 100-W B1KE combi boiler: Its documented time phases activate the DHW comfort function, which keeps the plate heat exchanger warm. This is different from scheduling a storage tank.
- Recirculation pump: Where supported and connected, its schedule is another setting to review.
These distinctions come from the North American B1HE/B1KE operating instructions; they shouldn’t be generalized to every Viessmann model. Vitodens 100-W operating instructions, pages 13–14
U.S. availability, prices, and the free alternative
Viessmann’s U.S. website offers ViCare for iOS and Android. Supported equipment needs an integrated internet connection or a compatible Vitoconnect module. An older boiler’s model and controller matter when checking module compatibility. Viessmann U.S. ViCare, Vitoconnect compatibility
U.S. price/function comparison — as of 2026-09-22
Costs below cover 12 months of incremental scheduling costs, assuming you already own the heating system, phone, and home internet connection. Energy costs are separate.
| Option | Relevant function | Platform and eligibility | 12-month cost and setup |
|---|---|---|---|
| ViCare basic controls | Adjust supported schedules remotely | iOS and Android; compatible connected Viessmann system | $0 app subscription for basic controls; $0 additional setup assumed if already connected. Required module and installer pricing: not publicly documented as a standard U.S. installed total |
| Existing boiler controls | Set a supported DHW time program directly | Boiler control panel; model and installation restrictions apply | $0 incremental software or hardware cost when the existing controller already supports scheduling and you program it yourself |
| ViCare paid features | Additional analysis and optimization, subject to country and equipment | U.S. feature eligibility unresolved in reviewed documentation | U.S. Apple listing shows $33.99 yearly or $3.99 monthly × 12 = $47.88, before any applicable tax. Android U.S. subscription price: not publicly documented in the reviewed listing |
Sources: U.S. Apple listing, Google Play listing, Viessmann subscription documentation, and documented onboard scheduling.
A listed subscription price does not prove U.S. feature availability. Viessmann’s Savings Assistant country list does not include the United States, despite the U.S. Apple listing displaying in-app purchases. The reviewed sources therefore don’t establish that a U.S. household can buy and use every advertised paid feature. Savings Assistant availability
ViCare: advantages and drawbacks
Advantages
- Convenient remote adjustments for households whose routines change.
- Basic controls don’t require buying a paid optimization package.
- A practical option when compatible equipment is already connected.
Drawbacks
- Hardware and installation restrictions can limit useful functions.
- Adding connectivity introduces an upfront cost that may outweigh modest savings.
- Paid-feature availability is insufficiently documented for a confident U.S. recommendation.
These are editorial assessments based on the compatibility and pricing sources above.
Best suited to: Families and singles who already have a connected, compatible Viessmann system.
Unsuitable for: Controlling another manufacturer’s water heater, or making a purchase based on assumed access to European features.
The onboard timer is a strong free alternative for a predictable routine. Our analysis is that entering an equivalent schedule on the boiler should offer the same scheduling benefit; the app’s additional value is convenience.
How to build a useful hot-water schedule
The following is a recommended planning process, not a universal sequence of app buttons. Menus depend on your equipment.
- Identify your busiest hot-water periods. Include showers, children’s baths, and other uses that draw from your hot-water supply.
- Find the DHW schedule exposed by your system. Keep it separate from the room-heating schedule.
- Allow time for reheating. A tank may need heating before the first shower, rather than starting at shower time.
- Give weekends their own schedule where needed. Avoid programming every day around a weekday routine.
- Adjust gradually. A schedule that repeatedly leaves you short of hot water is too restrictive.
The B2HE manual confirms that daily programs can differ and that tank reheating takes time. Viessmann operating instructions
An illustrative household schedule
For a family that showers around 7 a.m. and bathes children around 7 p.m., a hypothetical starting schedule might be:
- Morning heating window: 6–8 a.m.
- Evening heating window: 5:30–8 p.m.
- Later morning window on weekends.
Those times are examples, not manufacturer recommendations. Tank capacity, recovery time, and your household’s demand determine whether they work. A single person may need fewer heating periods; someone at home throughout the day may need broader coverage.
For occasional extra demand, Viessmann documents an “I want hot water” option in ViCare’s quick-selection menu. Its availability remains system-dependent. ViCare hot-water shortcut
Keep temperature safety separate from scheduling
This article does not recommend a universal lower storage temperature. The North American B1HE/B1KE manual advises against a DHW setting below 122°F for hygiene reasons and warns about hot-water injuries. Follow your model’s instructions and retain the installer’s hygiene and scald-protection arrangements. Vitodens 100-W operating instructions, page 16
What could you save over 12 months?
Hypothetical illustrative scenario—not a forecast
Assume a household’s revised schedule reduces gas consumption by 3,000 cubic feet over one year, after accounting for reheating. This reduction is an invented input for explaining the arithmetic, not a measured result or expected ViCare saving.
The U.S. Energy Information Administration reports a 2025 U.S. average residential gas price of $15.34 per thousand cubic feet. Using that historical price as a rough benchmark:
3 × $15.34 = $46.02 in illustrative annual energy savings. EIA residential natural-gas prices
| Route | Assumed annual energy saving | Incremental 12-month cost | Illustrative net saving |
|---|---|---|---|
| Basic ViCare, already connected | $46.02 | $0 | $46.02 |
| Same schedule on existing boiler controls | $46.02 | $0 | $46.02 |
| ViCare requiring new connectivity | $46.02 | Installed cost, C | $46.02 − C |
The hypothetical first-year break-even installation cost is $46.02. With unchanged annual savings, simple payback would be C ÷ $46.02 years.
For your own budget, use the charges actually avoided on your utility bill. The EIA average is not your tariff, and fixed charges that remain payable are not savings. Actual reductions could be smaller, larger, or negligible.
More importantly, if the existing boiler timer can run the same schedule, buying connectivity may produce no additional energy savings over that free alternative.
What about the new optimization features?
The Google Play release notes advertise a Hot Water Optimizer within Savings Assistant for compatible devices. Separately, Viessmann describes its DHW Savings Calculator as a simulation of changes to temperature and time programs—not measured savings. Google Play release notes, DHW Savings Calculator documentation
These developments don’t resolve the U.S. eligibility gap. Neither feature is assumed available or included in the savings scenario above.
Comparison method
Research was checked on September 22, 2026, for U.S. households. Criteria were DHW scheduling, equipment compatibility, mobile-platform support, regional eligibility, and incremental costs over 12 months.
Sources were Viessmann’s U.S. pages, North American operating manuals, developer support documentation, official app listings, DOE guidance, and EIA price data. This was a researched comparison, not hands-on testing. Other apps were excluded because they weren’t needed to compare ViCare scheduling with the existing boiler’s controls. European subscription availability was not treated as U.S. availability.
Conclusion
ViCare schedules can reduce unnecessary hot-water heating when your equipment supports them and the timing fits your household. The strongest budget case is an already-connected system. An existing boiler timer may deliver the same energy benefit without additional spending, while actual savings depend on your installation and avoided utility charges.
