Thermals vs Dynamic Type
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
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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.
Dynamic Type
This app offers developers and designers a visual reference for iOS' dynamic type system. It displays text styles at various scales, showing point sizes and percentages for accessibility and WCAG compliance.
- Visual representation of text styles
- Dynamic Type scale previews
- Point size details
- Scale percentage information
- Accessibility and WCAG conformance
- Developer and designer reference
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Useful developer and designer reference details for iOS' dynamic type system for scaling text. The app provides a visual representation of each type style at each Dynamic Type scale, plus details on the point size and scale percentage to ensure your app can be accessible and conformant with WCAG.
Screenshots
Verdict
The clearest difference is rating: Thermals at 4.5 against Dynamic Type's 4.0. Thermals also leads on ratings volume (28 vs 1) and chart position (#161 vs unranked). Dynamic Type's advantage is review sentiment (100% vs 83%) and iOS requirement (15.5 vs 18.6). On price, update cadence, ads and in-app purchases 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 4.0. That said, the two scores are not equally well evidenced: Thermals has 28 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 83% of Thermals's written reviews are positive against 100% of Dynamic Type's, so the app with the better star average is not the one people write more warmly about.
Thermals ships an update every 3 months, Dynamic Type every 5 months. The most recent releases landed on September 22, 2026 and August 15, 2026 respectively.
| Parameter | Thermals | Dynamic Type |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (28 ratings) — better | 4.0 (1 ratings) |
| Positive reviews | 83.3% of reviews | 100.0% of reviews — better |
| Number of ratings | 28 — better | 1 |
| Update frequency | Every 3 months — better | Every 5 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Best chart rank | #161 — better | — |
| Devices | iPhone, iPad, Apple Watch — better | iPhone, iPod |
| Requires iOS | 18.6 | 15.5 — better |
| Further details — not scored | ||
| Size | 3 MB | 0 MB |
| Age rating | 4+ | 4+ |
| Developer | George Garside | Matthew Flint |
Customer experience
Thermals
Dynamic Type
In-app purchases
Thermals
No in-app purchases
Dynamic Type
No in-app purchases
