Comparison

CleanAirOptima vs Sticky or Dry

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

Head to head
About

CleanAirOptima

Features
Read full description

Instant access, wherever you go. Connect smart Clean Air Optima devices, control and monitor them from everywhere in the world only through your smartphone. The CleanAirOptima app allows you to take full control of your indoor air quality. Connect your smart Clean Air Optima devices in a couple of taps: - Control and monitor your smart Clean Air Optima devices using this app from everywhere, either from your office or travelling around the world. All you need is internet access. - Depending on your smart devices, seamlessly monitor the real-time temperature and humidity and set your desired parameter with only a few taps. - Create different rooms in your home, e.g. living room, bedrooms, etc., and specify in which room your smart device is located. In this way, you can keep track of temperature and humidity in different areas in your home. We are working on one of the most important things in the world: Fresh, healthy indoor air. Clean Air Optima International B.V. stands for innovative Clean Air Optima® Air Treatment Technology with healthy indoor air, designed in Germany. Through innovative technology and unique styles, the products of Clean Air Optima fit seamlessly into the individual living ambience. Clean Air Optima Corporate Philosophy. The Clean Air Optima Group ensures its existence through the Satisfaction of its customers. The stated goal is highest Customer satisfaction. Clean Air Optima® products are Certified according to their intended purpose. And for this we constantly monitor the quality of the product, analyze customer problems and recommend appropriate solutions. We offer our customers a high quality customer service: they receive expert advice before and after purchasing our products.

About

Sticky or Dry

Features
Read full description

Your thermostat only tells part of the story. Sticky or Dry brings temperature and relative humidity together, helping you understand how the air in and around your home actually feels. Compare indoor and outdoor conditions, see how they change over time, and get practical guidance for making your place feel better. KNOW WHAT TO DO NEXT The Indoor Climate Guide compares your chosen indoor and outdoor data points and considers the climate-control equipment available in your home. It can help you decide when to open or close the windows, use an air conditioner or heater, adjust window shades, or simply turn on a fan. When enabled, it can also look at the next six hours of weather to prepare for changing conditions. COMFORT IS MORE THAN TEMPERATURE Two rooms at the same temperature can feel completely different. The reason is moisture. Relative humidity describes how much moisture the air holds compared with the maximum it could hold at that temperature. Dew point brings temperature and relative humidity together into a clearer measure of how much moisture is actually in the air. A lower dew point tends to feel dry. A higher dew point can feel sticky or muggy. Sticky or Dry visualizes this relationship using colored comfort bands, helping you see at a glance where each room or location sits. BRING YOUR CONDITIONS TOGETHER Add different kinds of data points to the same interactive chart: • Weather locations with current outdoor conditions and forecast • Compatible temperature and humidity sensors from the Apple Home app • Manual data points you can drag around the chart yourself Manual data points make the app useful even without a home sensor. Use them to enter a reading from another thermometer or hygrometer, or explore how different combinations of temperature and humidity might feel. Compatible Apple Home accessories include sensors such as the SONOFF AirGuard, Aqara Climate Sensor W100, Eve Weather, IKEA ALPSTUGA, and IKEA TIMMERFLOTTE. Compatibility depends on the accessory exposing its temperature or humidity readings through the Apple Home app. SEE HOW CONDITIONS CHANGE Historic trails show how each data point has moved across the chart over time. Follow up to 24 hours of captured readings to see whether a room is becoming warmer, cooler, drier, or more humid. MAKE IT YOUR OWN • Give every data point its own label and color • Choose Celsius or Fahrenheit • Set your desired indoor temperature range • Select the equipment available in your home • Compare any indoor and outdoor data points • Inspect temperature, relative humidity, and calculated dew point at a glance Sticky or Dry is designed for iPhone, iPad, and Mac. Its comfort calculations and guidance are performed on-device. Understand your indoor climate and make your place feel better. Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

CleanAirOptima4 screens
Sticky or Dry4 screens

Verdict

The call

The clearest difference is in-app purchases: CleanAirOptima at none against Sticky or Dry's 1. CleanAirOptima also leads on iOS requirement (12.0 vs 26.0). Sticky or Dry's advantage is update cadence (every 10 days vs every 17 months). On price, ads 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

Both are free to download. Sticky or Dry sells 1 in-app purchase, starting at $2.99 per year. CleanAirOptima asks for nothing beyond the download.

UpkeepUpdate frequency

CleanAirOptima ships an update every 17 months, Sticky or Dry every 10 days. The most recent releases landed on October 23, 2026 and October 25, 2026 respectively.

Scorecard3 real differences · 5 level
CleanAirOptima versus Sticky or Dry: the parameters behind the verdict, then further details
ParameterCleanAirOptimaSticky or Dry
PriceFreeFree
Rating1.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 17 monthsEvery 10 days — better
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPodiPhone, iPad, Mac — better
Requires iOS12.0 — better26.0
Further details — not scored
Size194 MB5 MB
Age rating4+4+
DeveloperClean Air Optima International B.V.Arcana Media

In-app purchases

None

CleanAirOptima

No in-app purchases

1 purchases

Sticky or Dry

Subscriptions1
  • Sticky or Dry Pro Yearly$2.991 Year

Questions

Is CleanAirOptima free?
CleanAirOptima is free to download, with no in-app purchases.
Is Sticky or Dry free?
Sticky or Dry is free to download, with in-app purchases available.
Do CleanAirOptima or Sticky or Dry have ads?
Neither CleanAirOptima nor Sticky or Dry shows ads.
Which is updated more often, CleanAirOptima or Sticky or Dry?
CleanAirOptima ships an update every 17 months, and Sticky or Dry every 10 days. Most recently, CleanAirOptima was updated on October 23, 2026 and Sticky or Dry on October 25, 2026.

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