Comparison

LunaSolCal vs VBus®Touch FK

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

Head to head
About

LunaSolCal

This app calculates precise times for sun and moon events, including sunrise, sunset, moonrise, and moonset, for any location and date. It also provides detailed astronomical data and tracks celestial movements. View daily information in the notification center.

Highlights
  • Sunrise and sunset times
  • Moonrise and moonset times
  • Day length calculation
  • Moon phase tracking
  • Twilight times (civil, nautical, astronomical)
  • Solar and lunar eclipse dates
  • Location-based calculations via GPS or city database
Read full description

Calculate times of sunrise, sunset, moonrise, moonset and more for your location at any given date. The following data is calculated: - Sunrise - Solar noon - Sunset - Day length - Equation of time - Declination - Civil twilight (Dawn/Dusk) - Nautical twilight (Dawn/Dusk) - Astronomical twilight (Dawn/Dusk) - Azimuth at sunrise and sunset - Altitude during solar noon - Sun track - Date and time of Seasons (Spring, Summer, Fall, Winter) - Solstice and Equinox dates - Date and time of next solar eclipse - Moonrise - Moon transit - Moonset - Moon phase - Distance - Declination - Date and time of next new moon - Date and time of next full moon - Azimuth at moonrise and moonset - Altitude during moon transit - Moon track - Date and time of next lunar eclipse Some information for the current day can also be viewed in the notification center. To specify the location of interest either get the position from the built-in GPS or Wifi receiver or select a city from a database with over 400,000 cities in over 200 countries.

About

VBus®Touch FK

Transform your mobile device into a remote display for your boiler controller. Monitor boiler temperature, storage temperatures, and loading status with animated graphics and color-coded visualizations. Receive alerts for potential technical malfunctions.

Highlights
  • Remote boiler controller display
  • Animated graphic visualizations
  • Temperature and loading status monitoring
  • Color-coded temperature layers
  • Sensor monitoring and malfunction alerts
Features
Read full description

With VBus®Touch FK, you can turn your mobile devices into a RESOL remote data display for your solid fuel or biomass boiler controller. The system data are displayed in a clearly arranged, animated graphic: • Boiler temperature • Store top and base temperatures • Loading status Temperature layers inside the store are also visualised by means of a colour gradient. The app also helps to keep an eye on the sensors and will alert the user to possible technical malfunctions. System requirements: • Internet connection of the controller via RESOL Datalogger or Communication module • VBus.net user account (sign-up is free of charge)

Screenshots

LunaSolCal4 screens
VBus®Touch FK4 screens

Verdict

The call

The clearest difference is review sentiment: LunaSolCal at 95% against VBus®Touch FK's 0%. LunaSolCal also leads on monetization model (free vs paid) and update cadence (every 2 months vs every 48 months). 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

LunaSolCal costs $4.99 and VBus®Touch FK $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

LunaSolCal ships an update every 2 months, VBus®Touch FK every 48 months. The most recent releases landed on September 24, 2026 and August 24, 2026 respectively.

Scorecard3 real differences · 7 level
LunaSolCal versus VBus®Touch FK: the parameters behind the verdict, then further details
ParameterLunaSolCalVBus®Touch FK
Price$4.99$4.99
Rating4.9 (1.2K ratings) — better—
Positive reviews95.5% of reviews — better0.0% of reviews
Number of ratings1.2K — better—
Update frequencyEvery 2 months — betterEvery 48 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.012.0
Further details — not scored
Size79 MB8 MB
Age rating4+4+
DeveloperVolker Voecking Software EngineeringRESOL GmbH

Customer experience

LunaSolCal

All ratings1,176 ratings
Positive98.8%
Neutral0.8%
Negative0.4%
Written reviews264 reviews
Positive95.5%
Neutral1.9%
Negative2.7%

VBus®Touch FK

Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Bugs and requests

LunaSolCal

Reported bugs

2 issues
  • Notifications not working properly
  • Crashes when using map layer select

Requested features

3 requests
  • Add lockscreen widget
  • Implement automatic light/dark mode switching
  • Integrate with calendar for event planning

VBus®Touch FK

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

LunaSolCal

No in-app purchases

None

VBus®Touch FK

No in-app purchases

Questions

Is LunaSolCal free?
LunaSolCal costs $4.99, with no in-app purchases.
Is VBus®Touch FK free?
VBus®Touch FK costs $4.99, with no in-app purchases.
Do LunaSolCal or VBus®Touch FK have ads?
Neither LunaSolCal nor VBus®Touch FK shows ads.
Which is updated more often, LunaSolCal or VBus®Touch FK?
LunaSolCal ships an update every 2 months, and VBus®Touch FK every 48 months. Most recently, LunaSolCal was updated on September 24, 2026 and VBus®Touch FK on August 24, 2026.

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