# Thermals vs Tester

The clearest difference is in-app purchases: Thermals at none against Tester's 7. Tester's advantage is update cadence (every 2 days vs every 3 months) and ratings volume (584 vs 28). On price, review sentiment, ads and monetization model there is nothing between them.

Both are free to download. Tester sells 7 in-app purchases, starting at $0.99 per 7 days. Thermals asks for nothing beyond the download.

Tester holds the better App Store score, 4.7 against 4.5. That said, the two scores are not equally well evidenced: Tester has 584 ratings behind it against 28, 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 90% of Tester's.

Thermals ships an update every 3 months, Tester every 2 days. The most recent releases landed on October 19, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Thermals | Tester |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (28 ratings)](https://appshunter.io/ios/app/thermals/id1567050762/reviews) | **[4.7 (584 ratings)](https://appshunter.io/ios/app/tester-super-intelligence/id1575521212/reviews)** |
| Number of ratings | 28 | **584** |
| Positive reviews | 83.3% of reviews | **89.9% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 days** |
| Monetization | Free | Free |
| Best chart rank | #179 | **#100** |
| Size | 3 MB | 76 MB |
| Requires iOS | **18.6** | 18.7 |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [George Garside](https://appshunter.io/developer/815604170) | [FJEDI](https://appshunter.io/developer/1740595411) |

## What reviewers say

### Thermals

[App page](https://appshunter.io/ios/app/thermals/id1567050762)

**Currently charting:** #179 Top Free · Developer Tools (US App Store)

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.

**Highlights:** 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

**Features:** Apple Watch app

**In-app purchases:** none


### Tester

[App page](https://appshunter.io/ios/app/tester-super-intelligence/id1575521212)

**Currently charting:** #100 Top Grossing · Developer Tools, #198 Top Free · Developer Tools (US App Store)

Test various APIs directly from your mobile device. Supports REST, GraphQL, WebSockets, and more, with advanced editors and request customization. Share requests easily and manage cookies and history.

**Highlights:** Test REST, GraphQL, WebSocket, SOAP, JSON RPC, XML, HTTP, HTTPS APIs, Powerful GraphQL editor with query, mutation, subscription support, WebSocket testing tool for WS and WSS connections, Flexible request data encoding and transfer types, Import requests from curl, links, or files (Swagger, OpenAPI, Postman), One-tap request sharing via deep link or cURL command, Apple Watch app for sending requests from your wrist

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tester Go Weekly | $0.99 | per 7 days |
| Tester Go Monthly | $4.99 | per month |
| Tester Plus Monthly | $7.99 | per month |
| Tester Pro Monthly | $19.99 | per month |
| Tester Plus Yearly | $79.99 | per year |
| Tester Pro Yearly | $200.00 | per year |
| Tester Plus Lifetime | $89.99 | one-time |

**What reviewers like**

- 👍 User-friendly and modern UI
- 🚀 Comprehensive and intuitive
- 🔓 No in-app purchases
- 🛠️ All-in-one dev tool
- 💡 Shortcuts integration

**What reviewers complain about**

- 🐛 Crashes and data loss after updates
- 🔍 Lack of cloud backup/sync
- 🔧 Difficult to manage requests/collections
- 🖱️ Editing issues with long keys
- 🌐 No IPv6 support

**Reported bugs**

- Deleting all saved requests after updates
- App launching to a black screen
- Shortcuts integration not working as expected

**Requested features**

- Add support for environment variables
- Implement folders/collections management
- Allow exporting/importing data as JSON
- Provide more Shortcuts actions
- Add ability to change app icon


## Frequently asked questions

### Is Thermals free?

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

### Is Tester free?

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

### Which has better reviews, Thermals or Tester?

Tester is rated higher. Thermals averages 4.5 out of 5 from 28 ratings, while Tester averages 4.7 from 584 ratings.

### Do Thermals or Tester have ads?

Neither Thermals nor Tester shows ads.

### Which is updated more often, Thermals or Tester?

Thermals ships an update every 3 months, and Tester every 2 days. Most recently, Thermals was updated on October 19, 2026 and Tester on October 21, 2026.

### Which is more popular, Thermals or Tester?

Thermals currently peaks at #179 in the App Store charts, and Tester at #100. Chart position reflects recent download velocity rather than total install base.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*