# PRS Shot Timer vs Calypso Ballistics

PRS Shot Timer and Calypso Ballistics are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

PRS Shot Timer ships an update every 3 days, Calypso Ballistics every 5 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | PRS Shot Timer | Calypso Ballistics |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 5 days |
| Size | 26 MB | 20 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [EX Corporation Oy](https://appshunter.io/developer/1391053704) | [Calypso Instruments](https://appshunter.io/developer/928168289) |

## What reviewers say

### PRS Shot Timer

[App page](https://appshunter.io/ios/app/prs-shot-timer-par-timer/id6796382650)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### Calypso Ballistics

[App page](https://appshunter.io/ios/app/calypso-ballistics/id6815266601)

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

**In-app purchases:** none


## Frequently asked questions

### Is PRS Shot Timer free?

PRS Shot Timer is free to download, with no in-app purchases.

### Is Calypso Ballistics free?

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

### Do PRS Shot Timer or Calypso Ballistics have ads?

Neither PRS Shot Timer nor Calypso Ballistics shows ads.

### Which is updated more often, PRS Shot Timer or Calypso Ballistics?

PRS Shot Timer ships an update every 3 days, and Calypso Ballistics every 5 days. Most recently, PRS Shot Timer was updated on October 24, 2026 and Calypso Ballistics on October 25, 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.*