# BulletCalc3 vs Chronverter

The clearest difference is price: Chronverter at Free against BulletCalc3's $0.99. BulletCalc3's advantage is iOS requirement (15.6 vs 18.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

Chronverter is free to download; BulletCalc3 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 2 months. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | BulletCalc3 | Chronverter |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/bulletcalc3/id1660120327/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Paid | — |
| Size | 6 MB | 4 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Jack McCormack](https://appshunter.io/developer/1658121467) | [Arthur Christopher Belmonte](https://appshunter.io/developer/1552997792) |

## What reviewers say

### BulletCalc3

[App page](https://appshunter.io/ios/app/bulletcalc3/id1660120327)

Calculate ballistic trajectories for firearms with detailed charts and data. Offers metric and imperial units, automatic calculation of bullet drop, energy, and velocity at various ranges. Includes features for adjusting gun sight zero and measuring slant angles.

**Highlights:** Metric/Imperial unit support, Dynamic ballistic charts, Automatic FPS/Energy/Drop calculation, Gun sight zero adjustment, Slant angle measurement, Web search for bullet specs, Export distance data

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

**In-app purchases:** none


### Chronverter

[App page](https://appshunter.io/ios/app/chronverter/id6759367291)

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

**In-app purchases:** none


## Frequently asked questions

### Is BulletCalc3 free?

BulletCalc3 costs $0.99, with no in-app purchases.

### Is Chronverter free?

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

### Do BulletCalc3 or Chronverter have ads?

Neither BulletCalc3 nor Chronverter shows ads.

### Which is updated more often, BulletCalc3 or Chronverter?

BulletCalc3 ships an update every 2 months, and Chronverter every 2 months. Most recently, BulletCalc3 was updated on October 24, 2026 and Chronverter on October 28, 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.*