# Rad Onc Calc vs Hold It

The clearest difference is price: Rad Onc Calc at Free against Hold It's $9.99. Rad Onc Calc also leads on iOS requirement (14.0 vs 18.0). Hold It's advantage is update cadence (every 2 weeks vs every 6 weeks). On ads, in-app purchases and device support there is nothing between them.

Rad Onc Calc is free to download; Hold It costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Rad Onc Calc ships an update every 6 weeks, Hold It every 2 weeks. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Rad Onc Calc | Hold It |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | **[4.6 (12 ratings)](https://appshunter.io/ios/app/rad-onc-calc/id1494077153/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 2 weeks** |
| Monetization | **Free** | Paid |
| Size | 57 MB | 3 MB |
| Requires iOS | **14.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Matthew Culbert](https://appshunter.io/developer/1435398886) | [kaisei watanabe](https://appshunter.io/developer/1543587757) |

## What reviewers say

### Rad Onc Calc

[App page](https://appshunter.io/ios/app/rad-onc-calc/id1494077153)

A radiation oncology calculator and reference tool for medical professionals. It provides quick access to essential calculations and treatment constraints.

**Highlights:** Radiation oncology calculations, Treatment constraints reference, Quick access to essential data, Comprehensive tool for professionals

**Features:** macOS Compatibility

**In-app purchases:** none


### Hold It

[App page](https://appshunter.io/ios/app/hold-it-simple-app-blocker/id6745756356)

This app helps you stay focused by limiting access to distracting applications during study or deep work sessions. Set daily time limits or launch counts for chosen apps with a simple, private, and effective system. Pay once and use it forever, with no recurring fees or hidden costs.

**Highlights:** Limit app usage by time or launches, One-time purchase, no subscriptions, Simple setup in under a minute, Works fully offline, Private, no data uploaded or shared, Designed for students and deep work

**In-app purchases:** none


## Frequently asked questions

### Is Rad Onc Calc free?

Rad Onc Calc is free to download, with no in-app purchases.

### Is Hold It free?

Hold It costs $9.99, with no in-app purchases.

### Do Rad Onc Calc or Hold It have ads?

Neither Rad Onc Calc nor Hold It shows ads.

### Which is updated more often, Rad Onc Calc or Hold It?

Rad Onc Calc ships an update every 6 weeks, and Hold It every 2 weeks. Most recently, Rad Onc Calc was updated on November 3, 2026 and Hold It on November 5, 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.*