Comparison

Stadler Form vs SOLAR

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

Head to head
About

Stadler Form

Control your Stadler Form air treatment devices remotely via Wi-Fi. Monitor room air quality, adjust settings like power level and timer, and activate features such as auto-mode and child lock. Connect your compatible air humidifier or purifier quickly and easily.

Highlights
  • Remote device control
  • Wi-Fi and Bluetooth connectivity
  • Monitor room air values
  • Adjust power levels
  • Timer function
  • Auto-mode activation
  • Child lock
Features
Read full description

The Stadler Form app allows you to use your Stadler Form air treatment device even more efficiently. Control one or more Stadler Form devices that are equipped with Wi-Fi while on the move. This applies to selected Stadler Form products such as air humidifier or air purifier. You can connect your device quickly and easily with the app via Wi-Fi network and Bluetooth. Get started straight away. Check the current values in the room air and which functions on the device are activated. A child lock can be activated and deactivated on the app, which ensures that the settings on the device can no longer be adjusted. You can use the app to control all functions of your Stadler Form device, such as adjusting the power level in the app, using the timer function or activating the auto-mode. Detailed instructions and specifications can be found on the Stadler Form website.

About

SOLAR

Features
Read full description

Know how much daylight is left. Find golden hour. See where the Sun and Moon will be. SOLAR brings the changing sky to your iPhone. Check the light before a walk, choose a moment for a photo, or slide through the day and watch morning become night. MAKE THE MOST OF DAYLIGHT See sunrise, solar noon and sunset for your chosen place, with a countdown to the next sunrise or sunset. Explore golden hour, blue hour and the stages of twilight. EXPLORE A DAY. OR A SEASON. Move through the hours to follow the Sun and Moon. Check the Moon’s phase, reveal their paths, and explore how the Sun’s position changes through the year. A changing sky, drifting clouds and an animated sea bring the view to life. Choose which visual layers to show. FOUR WAYS TO READ TIME Read familiar Local Time or switch to Solar Time, where 12:00 is local solar noon. Try Seasonal Hours, which divide daylight and night into twelve parts each, with hour lengths that change through the year. Or discover Byzantine Time, with equal-length hours counted from sunset. A REMINDER TO LOOK UP Set reminders for sunrise, sunset, golden hour and other solar events. Choose when to be notified and which days to include. FIND THE SUN AND MOON On supported iPhones, use augmented reality to see the calculated positions of the Sun and Moon over your camera view. THE DAY, AT A GLANCE Add widgets for solar time, daylight and the Moon to your Home Screen or Lock Screen. On Apple Watch, check today’s solar events and add the next sunrise or sunset to your watch face. SHARE THE LIGHT Share a sky image from the moment you’re exploring. No account. No ads. Core solar calculations run on your device. The illustrated sky, clouds and sea are visualizations, not a live view of your surroundings. AR requires a compatible iPhone, camera access and location permission.

Screenshots

Stadler Form4 screens
SOLAR4 screens

Verdict

The call

The clearest difference is price: Stadler Form at Free against SOLAR's $2.99. Stadler Form also leads on iOS requirement (13.0 vs 18.0). SOLAR's advantage is update cadence (fortnightly vs every 8 months). On 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

Stadler Form is free to download; SOLAR costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Stadler Form ships an update every 8 months, SOLAR fortnightly. The most recent releases landed on October 11, 2026 and October 18, 2026 respectively.

Scorecard3 real differences · 7 level
Stadler Form versus SOLAR: the parameters behind the verdict, then further details
ParameterStadler FormSOLAR
PriceFree — better$2.99
Rating1.0 (3 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 8 monthsFortnightly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPodiPhone, Apple Watch
Requires iOS13.0 — better18.0
Further details — not scored
Size211 MB20 MB
Age rating12+4+
DeveloperStadler Form Aktiengesellschafttimothe marcellin

In-app purchases

None

Stadler Form

No in-app purchases

None

SOLAR

No in-app purchases

Questions

Is Stadler Form free?
Stadler Form is free to download, with no in-app purchases.
Is SOLAR free?
SOLAR costs $2.99, with no in-app purchases.
Do Stadler Form or SOLAR have ads?
Neither Stadler Form nor SOLAR shows ads.
Which is updated more often, Stadler Form or SOLAR?
Stadler Form ships an update every 8 months, and SOLAR fortnightly. Most recently, Stadler Form was updated on October 11, 2026 and SOLAR on October 18, 2026.

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