Thermals vs zero
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Thermals
Monitor your device's thermal state and processor activity to diagnose performance issues. Understand why your phone might be running slowly, charging slowly, or have reduced brightness due to overheating. Export data for further analysis with other development tools.
- Displays device thermal state
- Shows active processor count
- Monitors device uptime
- Troubleshoots performance issues
- Helps diagnose slow charging
- Identifies brightness limitations
- Exports raw data for analysis
Read full descriptionHide full description
Phone running slowly, charging slowly or low brightness? See if your device is overheating using Thermals. Thermals displays your device’s thermal state, as well as how many processors are active on your device and its uptime, as reported by iOS. Thermals helps troubleshoot: • Poor performance — iOS reduces processor speed and potentially disables processors temporarily when the device is hot. • Slow charging — battery charging causes a lot of heat and iOS can limit charging speed to reduce the additional heat that might make a device too hot. • Low maximum brightness — if your device screen stays dark despite being on full brightness, it could be limited by iOS due to heat. • Manufacturing defects — if not all processors are active when the device is cool and not in low power mode. Your device's thermal state is monitored regularly in the background and recorded in the app (if Background App Refresh is enabled). Open the app or tap the widget to record a data point manually. Export the raw data to file for corroboration with Screen Time, Xcode's Instruments, or other development tools. Also an independent Apple Watch app shows the thermal status, active processors and uptime, and thermal history of your watch.
zero
Control your burglar alarm remotely via SMS commands. This application simplifies sending instructions to your alarm system without manual text input.
- Remote alarm control
- SMS command sending
- Multiple location support
- Simplified interface
- No manual text typing
Read full descriptionHide full description
This program is designed to control the burglar alarm in zero locations and the way it works is that it will send the desired commands to the burglar through SMS and you don't need to type the text of the SMS and send it to the burglar.
Screenshots
Verdict
The clearest difference is ads: Thermals at none against zero's shown. Thermals also leads on review sentiment (83% vs 50%) and rating (4.5 vs 4.3). zero's advantage is update cadence (every 2 months vs every 3 months) and iOS requirement (15.6 vs 18.6). On price, in-app purchases, chart position 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.
Thermals holds the better App Store score, 4.5 against 4.3. That said, the two scores are not equally well evidenced: Thermals has 28 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 83% of Thermals's written reviews are positive against 50% of zero's.
Thermals ships an update every 3 months, zero every 2 months. The most recent releases landed on September 22, 2026 and September 21, 2026 respectively.
| Parameter | Thermals | zero |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (28 ratings) — better | 4.3 (4 ratings) |
| Positive reviews | 83.3% of reviews — better | 50.0% of reviews |
| Number of ratings | 28 — better | 4 |
| Update frequency | Every 3 months | Every 2 months — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Best chart rank | #116 — better | #202 |
| Devices | iPhone, iPad, Apple Watch — better | iPhone, iPod |
| Requires iOS | 18.6 | 15.6 — better |
| Further details — not scored | ||
| Size | 3 MB | 37 MB |
| Age rating | 4+ | 4+ |
| Developer | George Garside | Mohammad Alipour Behzadi |
Customer experience
Thermals
zero
In-app purchases
Thermals
No in-app purchases
zero
No in-app purchases
