Comparison

Smart iMeters vs 23HourDay

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

Head to head

About

Smart iMeters

Features

Read full description

Smart iMeters is a free APP that can be installed on smartphones and connected to the surrounding Therperature Humidity Meter, Sound Meter , Anemometer, Light Meter and Tachometer via Bluetooth to measure and record temperature and humidity, noise, wind speed, illuminance and rotational velocity in real time.

About

23HourDay

Features

Read full description

The App is designed to be a super-organizer, especially for people in business. The App ledgers all of your websites with each website having an individual handy note. A second program ledgers all of your other notes and also has a reminder alarm feature. Here's the link to the privacy policy : https://api.23hourday.com/privacy-policy Here's the link to the terms of use : https://api.23hourday.com/terms-of-use

Screenshots

Smart iMeters3 screens

23HourDay4 screens

Verdict

The call

The clearest difference is in-app purchases: Smart iMeters at none against 23HourDay's 2. 23HourDay's advantage is update cadence (fortnightly vs every 9 months). On price, ads, device support and iOS requirement 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. 23HourDay sells 2 in-app purchases, starting at $12.95 per month. Smart iMeters asks for nothing beyond the download.

UpkeepUpdate frequency

Smart iMeters ships an update every 9 months, 23HourDay fortnightly. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

Scorecard2 real differences · 4 level

Smart iMeters versus 23HourDay: the parameters behind the verdict, then further details
Parameter	Smart iMeters	23HourDay
Price	Free	Free
Update frequency	Every 9 months	Fortnightly — better
Ads	No	No
In-app purchases	No — better	Yes
Devices	iPhone, iPod	iPhone, iPod
Requires iOS	15.0	14.0 — better
Further details — not scored
Size	29 MB	71 MB
Age rating	4+	4+
Developer	Smart iMeters	Thomas Smith

In-app purchases

None

Smart iMeters

No in-app purchases

2 purchases

23HourDay

Subscriptions2

Premium Plan - Monthly$12.951 Month
Premium Plan - Yearly$149.001 Year

Questions

Is Smart iMeters free?

Smart iMeters is free to download, with no in-app purchases.

Is 23HourDay free?

23HourDay is free to download, with in-app purchases available.

Do Smart iMeters or 23HourDay have ads?

Neither Smart iMeters nor 23HourDay shows ads.

Which is updated more often, Smart iMeters or 23HourDay?

Smart iMeters ships an update every 9 months, and 23HourDay fortnightly. Most recently, Smart iMeters was updated on November 3, 2026 and 23HourDay on November 4, 2026.