Occu vs ATC CALA
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Occu
Manage your apartment living experience with ease. Pay rent, submit maintenance requests with media, reserve amenities, and stay connected with your community. Track package deliveries and even renew your lease directly within the app.
- Arrange rent payments
- Submit maintenance requests
- Reserve community amenities
- Track package deliveries
- Community message board
- Lease renewal
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The Occu Resident app gives you access to all that the Occu community has to offer at your fingertips. We make it easy to pay your rent, request maintenance or reserve amenities. Occu Resident app features (Options vary depending on location): - Arrange rent payments by multiple methods - See up coming Occu events - Submit maintenance requests with photos and voice memos and track progress - Reserve development amenities - Track when your packages are delivered or picked up - Schedule garden maintenance - Community interaction through the Occu Message Board - Sign and complete your lease renewal directly in the app
ATC CALA
Control your new ATC thermal emitters remotely. Adjust settings, monitor performance, and manage your heating system from your smartphone. Designed for efficient and convenient home climate management.
- Remote control of thermal emitters
- Adjust settings
- Monitor performance
- Manage heating system
- Smartphone integration
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App for controlling the new ATC thermal emitters
Screenshots
Verdict
The clearest difference is rating: Occu at 4.4 against ATC CALA's 2.0. Occu also leads on ads (none vs shown) and monetization model (free vs ad-supported). ATC CALA's advantage is update cadence (every 6 weeks vs every 9 months) and review sentiment (50% vs 25%). On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Occu holds the better App Store score, 4.4 against 2.0. That said, the two scores are not equally well evidenced: Occu has 7 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 25% of Occu's written reviews are positive against 50% of ATC CALA's, so the app with the better star average is not the one people write more warmly about.
Occu ships an update every 9 months, ATC CALA every 6 weeks. The most recent releases landed on October 24, 2026 and October 13, 2026 respectively.
| Parameter | Occu | ATC CALA |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (7 ratings) — better | 2.0 (1 ratings) |
| Positive reviews | 25.0% of reviews | 50.0% of reviews — better |
| Number of ratings | 7 — better | 1 |
| Update frequency | Every 9 months | Every 6 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 — better | 14.6 |
| Further details — not scored | ||
| Size | 59 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | Yardi Systems, Inc. | Ferroli España |
Customer experience
Occu
ATC CALA
In-app purchases
Occu
No in-app purchases
ATC CALA
No in-app purchases
