# Decay calc vs Microwave Link Calculator

The clearest difference is review sentiment: Microwave Link Calculator at 100% against Decay calc's 50%. Microwave Link Calculator also leads on update cadence (every 9 days vs every 3 months). Decay calc's advantage is monetization model (free with in-app purchases vs subscription) and iOS requirement (15.2 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Decay calc sells 1 one-off in-app purchase and Microwave Link Calculator sells 13 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Decay calc ships an update every 3 months, Microwave Link Calculator every 9 days. The most recent releases landed on October 8, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Decay calc | Microwave Link Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/decay-calc/id1479526735/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 9 days** |
| Monetization | **Free with in-app purchases** | Subscription |
| Size | 27 MB | 17 MB |
| Requires iOS | **15.2** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Alexey Baranov](https://appshunter.io/developer/1479526734) | [Tien Hoang](https://appshunter.io/developer/1743631038) |

## 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 |


### Microwave Link Calculator

[App page](https://appshunter.io/ios/app/microwave-link-calculator/id6499489507)

This tool helps telecommunications engineers calculate and optimize microwave links. It provides precise distance, azimuth, and elevation computations, antenna configuration, and integrated mapping for accurate outdoor equipment placement.

**Highlights:** Precise distance, azimuth, and elevation calculations, Fresnel Zone computation, Antenna down tilt and azimuth determination, Antenna gain and received power prediction, Integrated Apple Maps view, Obstacle simulation for elevation profiles, Compass with haptic feedback

**Features:** macOS Compatibility

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All Access | $1.99 | per month |
| All Access | $2.99 | per month |
| All Access | $2.99 | per month |
| All Access | $2.99 | per month |
| All access. | $4.99 | per year |
| All access | $4.99 | per month |
| All access | $7.99 | per 3 months |
| All Access | $15.99 | per 6 months |
| All Access | $15.99 | per 6 months |
| All access | $24.99 | per 6 months |
| All access | $29.99 | per year |
| All Access | $29.99 | per year |
| All Access | $29.99 | per year |


## Frequently asked questions

### Is Decay calc free?

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

### Is Microwave Link Calculator free?

Microwave Link Calculator is free to download, with in-app purchases available.

### Do Decay calc or Microwave Link Calculator have ads?

Neither Decay calc nor Microwave Link Calculator shows ads.

### Which is updated more often, Decay calc or Microwave Link Calculator?

Decay calc ships an update every 3 months, and Microwave Link Calculator every 9 days. Most recently, Decay calc was updated on October 8, 2026 and Microwave Link Calculator on October 24, 2026.

---

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