# BTU Radiator Calculator vs EV CALC

The clearest difference is price: EV CALC at Free against BTU Radiator Calculator's $0.99. EV CALC also leads on iOS requirement (11.0 vs 26.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

EV CALC is free to download; BTU Radiator Calculator costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 3 weeks. Both last shipped on October 26, 2026.

## The numbers

| Metric | BTU Radiator Calculator | EV CALC |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[4.0 (1 ratings)](https://appshunter.io/ios/app/ev-calc/id1643348948/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 88.2% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | — | Free |
| Size | 1 MB | 23 MB |
| Requires iOS | 26.0 | **11.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Plan CD](https://appshunter.io/developer/309570233) | [Ulterium Ltd](https://appshunter.io/developer/979013939) |

## What reviewers say

### BTU Radiator Calculator

[App page](https://appshunter.io/ios/app/btu-radiator-calculator/id1441620006)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### EV CALC

[App page](https://appshunter.io/ios/app/ev-calc/id1643348948)

Estimate electric vehicle charging time, range, and cost across various charging systems. Features customizable charging speeds, a range slider, and a countdown timer with notifications. Supports all charger types and major EV models, with zero personal data collection and no ads.

**Highlights:** Estimate charge time, range, and cost, Customizable charging speeds, Range slider for desired range, Countdown timer with charge completion notifications, Supports all charger types and major EV models, Offline timer functionality, Zero personal data collection and no ads

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is BTU Radiator Calculator free?

BTU Radiator Calculator costs $0.99, with no in-app purchases.

### Is EV CALC free?

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

### Do BTU Radiator Calculator or EV CALC have ads?

Neither BTU Radiator Calculator nor EV CALC shows ads.

### Which is updated more often, BTU Radiator Calculator or EV CALC?

BTU Radiator Calculator ships an update every 3 weeks, and EV CALC every 3 weeks. Most recently, BTU Radiator Calculator was updated on October 26, 2026 and EV CALC on October 26, 2026.

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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.*