# BulletCalc3 vs Barometer ∞ Pressure Altitude

The clearest difference is price: Barometer ∞ Pressure Altitude at Free against BulletCalc3's $0.99. Barometer ∞ Pressure Altitude also leads on rating (5.0 vs 3.0). BulletCalc3's advantage is ads (none vs shown) and update cadence (every 2 months vs every 10 months). On ratings volume and in-app purchases there is nothing between them.

Barometer ∞ Pressure Altitude is free to download; BulletCalc3 costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Barometer ∞ Pressure Altitude holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

BulletCalc3 ships an update every 2 months, Barometer ∞ Pressure Altitude every 10 months. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | BulletCalc3 | Barometer ∞ Pressure Altitude |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/bulletcalc3/id1660120327/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/barometer-pressure-altitude/id6740811403/reviews)** |
| Number of ratings | **2** | 1 |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 2 months** | Every 10 months |
| Monetization | Paid | **Ad-supported** |
| Size | 6 MB | 16 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Jack McCormack](https://appshunter.io/developer/1658121467) | [Fawkes Wei](https://appshunter.io/developer/432767536) |

## 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


### Barometer ∞ Pressure Altitude

[App page](https://appshunter.io/ios/app/barometer-pressure-altitude/id6740811403)

Access your device's built-in barometer for real-time atmospheric pressure and altitude readings. Offers multiple units and works offline without requiring signup or subscriptions.

**Highlights:** Live barometric pressure readings, Current altitude display, Multiple pressure units (atm, hPa, kPa, Bar), Offline functionality, Native iOS design, Minimalist interface

**In-app purchases:** none


## Frequently asked questions

### Is BulletCalc3 free?

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

### Is Barometer ∞ Pressure Altitude free?

Barometer ∞ Pressure Altitude is free to download, with no in-app purchases.

### Which has better reviews, BulletCalc3 or Barometer ∞ Pressure Altitude?

Barometer ∞ Pressure Altitude is rated higher. BulletCalc3 averages 3.0 out of 5 from 2 ratings, while Barometer ∞ Pressure Altitude averages 5.0 from 1 ratings.

### Do BulletCalc3 or Barometer ∞ Pressure Altitude have ads?

Barometer ∞ Pressure Altitude shows ads; BulletCalc3 does not.

### Which is updated more often, BulletCalc3 or Barometer ∞ Pressure Altitude?

BulletCalc3 ships an update every 2 months, and Barometer ∞ Pressure Altitude every 10 months. Most recently, BulletCalc3 was updated on October 24, 2026 and Barometer ∞ Pressure Altitude on October 30, 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.*