Comparison

IRIS SmartST vs Absolute Humidity

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

Head to head
About

IRIS SmartST

This app helps you set up your smart speaker by registering your home WiFi information and choosing a voice command name. It facilitates the initial configuration for seamless integration with your smart home devices.

Highlights
  • Smart speaker initial setup
  • WiFi information registration
  • Voice command name setup
  • Device integration
Read full description

スマートスピーカーと連携する為の初期設定を行います。 ・ご家庭のWiFi情報の登録 ・音声呼び出しに使う名前の登録

About

Absolute Humidity

This app calculates and displays absolute humidity using temperature and relative humidity data from connected devices. It helps users understand their environmental comfort level with numerical values and visuals. A Pro version offers weather forecasts for any location.

Highlights
  • Absolute humidity calculation
  • Supports HomeKit & SwitchBot meters
  • Comfort level visualization
  • Weather information (Pro version)
  • Volumetric & gravimetric humidity display
  • Ad-free experience (Pro version)
Features
Read full description

Support your comfortable environment! “Absolute Humidity” is an application that calculates and displays absolute humidity using temperature and relative humidity data obtained from a thermohygrometer. It is designed so that the comfort level can be understood at a glance with numerical values ​​and visuals. In addition, you can get weather information of any area you set and display the current absolute humidity and forecasts (Pro version only). ■ Thermo-hygrometer device SwitchBot Meter, SwitchBot Meter Plus, SwitchBot Meter Pro, SwitchBot Meter Pro (CO2 Monitor), SwitchBot Indoor/Outdoor Thermo-Hygrometer, SwitchBot Hub 2, and HomeKit accessories registered in the Home app are available. If you using SwitchBot devices without a hub, data is displayed only within the range of Bluetooth communication with the thermo-hygrometer. Outside the Bluetooth communication range, such as on the go, data will be displayed only when the SwitchBot cloud service is set to cooperate. ■ Absolute humidity method The absolute humidity display supports both volumetric absolute humidity (g/m3) and gravimetric absolute humidity (g/kg). ■About subscription In the free version, the number of thermo-hygrometers that can be displayed is limited to 4, and advertisements are displayed in the app. The paid subscription “Absolute Humidity Pro” has no display restrictions or advertisements. As an Amazon Associate “Absolute Humidity” earns from qualifying purchases.

Screenshots

IRIS SmartST3 screens
Absolute Humidity4 screens

Verdict

The call

The clearest difference is review sentiment: Absolute Humidity at 80% against IRIS SmartST's 5%. IRIS SmartST's advantage is in-app purchases (none vs 2) and ads (none vs shown). On price, update cadence 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. Absolute Humidity sells 2 in-app purchases, starting at $1.99 per month. IRIS SmartST asks for nothing beyond the download.

UpkeepUpdate frequency

IRIS SmartST ships an update monthly, Absolute Humidity every 5 weeks. The most recent releases landed on September 19, 2026 and September 13, 2026 respectively.

Scorecard5 real differences · 5 level
IRIS SmartST versus Absolute Humidity: the parameters behind the verdict, then further details
ParameterIRIS SmartSTAbsolute Humidity
PriceFreeFree
Rating—4.5 (2 ratings) — better
Positive reviews5.0% of reviews80.0% of reviews — better
Number of ratings—2 — better
Update frequencyMonthly — betterEvery 5 weeks
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, Vision Pro
Requires iOS13.2 — better18.0
Further details — not scored
Size7 MB12 MB
Age rating4+4+
DeveloperIRIS OHYAMA INC.Yuta Hirobe

Customer experience

IRIS SmartST

Written reviews20 reviews
Positive5.0%
Neutral0.0%
Negative95.0%

Absolute Humidity

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews10 reviews
Positive80.0%
Neutral10.0%
Negative10.0%

In-app purchases

None

IRIS SmartST

No in-app purchases

2 purchases

Absolute Humidity

Subscriptions2
  • Monthly Plan$1.991 Month
  • Annual Plan1 Month trial$17.491 Year

Questions

Is IRIS SmartST free?
IRIS SmartST is free to download, with no in-app purchases.
Is Absolute Humidity free?
Absolute Humidity is free to download, with in-app purchases available.
Do IRIS SmartST or Absolute Humidity have ads?
Absolute Humidity shows ads; IRIS SmartST does not.
Which is updated more often, IRIS SmartST or Absolute Humidity?
IRIS SmartST ships an update monthly, and Absolute Humidity every 5 weeks. Most recently, IRIS SmartST was updated on September 19, 2026 and Absolute Humidity on September 13, 2026.

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