# Decay calc vs Terminator

The clearest difference is rating: Terminator at 5.0 against Decay calc's 1.0. Terminator also leads on in-app purchases (none vs 1) and update cadence (every 10 days vs every 3 months). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Decay calc sells 1 one-off in-app purchase. Terminator asks for nothing beyond the download.

Terminator holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

Decay calc ships an update every 3 months, Terminator every 10 days. The most recent releases landed on October 8, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Decay calc | Terminator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/decay-calc/id1479526735/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/terminator/id6448508683/reviews)** |
| Number of ratings | 1 | **2** |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 10 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 27 MB | 16 MB |
| Requires iOS | 15.2 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Alexey Baranov](https://appshunter.io/developer/1479526734) | [Victor Konoplianik](https://appshunter.io/developer/1684903299) |

## What reviewers say

### Decay calc

[App page](https://appshunter.io/ios/app/decay-calc/id1479526735)

This tool calculates the decay of radioactive isotopes over time, considering half-life for accurate activity predictions. It's useful in nuclear medicine, environmental monitoring, and radiation safety for handling and disposal of materials.

**Highlights:** Radioactive isotope decay calculation, Half-life integration, Activity prediction, Decay constant determination, Radiation dose calculation

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Radio calc | $0.99 | one-time |


### Terminator

[App page](https://appshunter.io/ios/app/terminator/id6448508683)

Modify your car's sound using a BLE-connected device. Choose from a variety of sound options within the app for a personalized audio experience. Gain full control over your vehicle's acoustics.

**Highlights:** BLE car sound modification, Multiple sound options, Full audio control, Customizable car acoustics

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Decay calc free?

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

### Is Terminator free?

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

### Which has better reviews, Decay calc or Terminator?

Terminator is rated higher. Decay calc averages 1.0 out of 5 from 1 ratings, while Terminator averages 5.0 from 2 ratings.

### Do Decay calc or Terminator have ads?

Neither Decay calc nor Terminator shows ads.

### Which is updated more often, Decay calc or Terminator?

Decay calc ships an update every 3 months, and Terminator every 10 days. Most recently, Decay calc was updated on October 8, 2026 and Terminator on September 29, 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.*