IEQ Calculator (Classroom) vs PolyU Library
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
IEQ Calculator (Classroom)
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IEQ calculator (Classroom) provides you an easier alternative to estimate the indoor environmental quality (IEQ) in air-conditioned classroom environment. You can examine the IEQ performance of a classroom by simply inputting several preset indoor environment parameters. The environmental performance of the classroom is expressed via a 5-star benchmarking scale (i.e. 5-stars BEST classroom, 1-star WORST classroom). This application is particularly useful for campus facilities management officers. Development team: Dr. LT Wong Dr. KW Mui Mr. HC Yu Mr. CT Cheung IEQ Research Team, Department of Building Services Engineering, The Hong Kong Polytechnic University Sources: Lee MC, Mui KW, Wong LT, Chan WY, Lee EWM, CT Cheung (2012). Student learning performance and indoor environmental quality (IEQ) in air-conditioned teaching rooms. Building and Environment 49, 238 โ 244.
PolyU Library
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PolyU Library Mobile App gives you a whole new experience in using library services and facilities: - Search and locate book collections and facilities with Augmented Reality (AR) indoor navigation - Find the availability of computers, group rooms, studios, seats, and study space in real time - Make reservation for library facilities, manage iBooking records and onsite check in/out the reserved rooms - View personal records of requested items and loans, and receive alert messages for borrowing and returning records, due date reminders and pick-up notices for requested items - Check-out books via NFC - Make advanced reservation for borrowing notebook computer - Listen to the audio guide of students sharing sessions and learning experiences when visiting the Outstanding Work by Students Showcase in the Library
Screenshots
Verdict
The clearest difference is update cadence: IEQ Calculator (Classroom) at every 6 days against PolyU Library's every 3 months. IEQ Calculator (Classroom) also leads on iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
IEQ Calculator (Classroom) ships an update every 6 days, PolyU Library every 3 months. The most recent releases landed on September 28, 2026 and October 14, 2026 respectively.
| Parameter | IEQ Calculator (Classroom) | PolyU Library |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 days โ better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad, iPod โ better |
| Requires iOS | 13.0 โ better | 15.0 |
| Further details โ not scored | ||
| Size | 1 MB | 35 MB |
| Age rating | 4+ | 17+ |
| Developer | Fishball Studio | The Hong Kong Polytechnic University |
In-app purchases
IEQ Calculator (Classroom)
No in-app purchases
PolyU Library
No in-app purchases
Questions
Is IEQ Calculator (Classroom) free?
Is PolyU Library free?
Do IEQ Calculator (Classroom) or PolyU Library have ads?
Which is updated more often, IEQ Calculator (Classroom) or PolyU Library?
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