Basic Calculator+ vs Bluetooth LE Thermometer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Basic Calculator+
Perform essential arithmetic operations with a straightforward calculator app. Its large buttons and clear display ensure ease of use, supporting both portrait and landscape orientations.
- Basic four functions
- Clear display
- Large buttons
- Portrait and landscape modes
- iPad compatible
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This simple calculator with a clear display and large buttons makes calculations easy. Portrait and landscape modes both available on iPad. This app uses the basic functions of the calculator to make the simplest, best, free calculator in the app store.
Bluetooth LE Thermometer
This utility app connects to compatible Bluetooth low energy thermometer hardware. It displays real-time temperature readings and offers both a thermometer view and a graph view for data visualization. Ideal for DIY projects and custom temperature monitoring setups.
- Bluetooth LE connectivity
- Real-time temperature updates
- Thermometer view
- Graph view
- Supports AT-09 and similar BLE devices
- DIY project friendly
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The Bluetooth LE Thermometer App connects to a Bluetooth low energy thermometer hardware device. The app updates temperature in real-time. The app currently has a thermometer view and a graph view. For the app to work, the device should transmit temperature readings over serial via an AT-09 or similar BLE device with a "\r\n" termination string. The AT-09 is popular for DIY projects where hobbyists could make their own devices and use apps like this one to test it. You can make your own device using an Arduino or similar microprocessor, with an AT-09 or similar BLE device. You can use an existing device if it uses similar internal hardware and data string. If you find that a device does not work with our app, let us know what device it is, and we'll either update our app to support it or add it to the unsupported list.
Screenshots
Verdict
The clearest difference is in-app purchases: Basic Calculator+ at none against Bluetooth LE Thermometer's 2. Basic Calculator+ also leads on ratings volume (243K vs 1) and update cadence (every 4 months vs every 10 months). Bluetooth LE Thermometer's advantage is ads (none vs shown) and review sentiment (100% vs 87%). On price, rating and iOS requirement 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. Bluetooth LE Thermometer sells 2 one-off in-app purchases. Basic Calculator+ asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.9 for Basic Calculator+ against 5.0 for Bluetooth LE Thermometer. That said, the two scores are not equally well evidenced: Basic Calculator+ has 243K ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 87% of Basic Calculator+'s written reviews are positive against 100% of Bluetooth LE Thermometer's.
Basic Calculator+ ships an update every 4 months, Bluetooth LE Thermometer every 10 months. The most recent releases landed on October 3, 2026 and September 22, 2026 respectively.
| Parameter | Basic Calculator+ | Bluetooth LE Thermometer |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (243K ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 87.5% of reviews | 100.0% of reviews — better |
| Number of ratings | 243K — better | 1 |
| Update frequency | Every 4 months — better | Every 10 months |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPod |
| Requires iOS | 10.0 — better | 11.0 |
| Further details — not scored | ||
| Size | 44 MB | 66 MB |
| Age rating | 4+ | 4+ |
| Developer | Best Free Apps | Dawid Fouche |
Customer experience
Basic Calculator+
Bluetooth LE Thermometer
Bugs and requests
Basic Calculator+
Reported bugs
2 issues- Incorrect calculation results
- Ads covering the screen
Requested features
3 requests- Add fraction button
- Implement order of operations
- Include memory function
Bluetooth LE Thermometer
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Basic Calculator+
No in-app purchases
Bluetooth LE Thermometer
- Ad Removal$0.99
- Coffee for the Developers$1.99
Questions
Is Basic Calculator+ free?
Is Bluetooth LE Thermometer free?
Which has better reviews, Basic Calculator+ or Bluetooth LE Thermometer?
Do Basic Calculator+ or Bluetooth LE Thermometer have ads?
Which is updated more often, Basic Calculator+ or Bluetooth LE Thermometer?
Other comparisons
