# Power Factor Estimator vs Blast Buddy

The clearest difference is in-app purchases: Power Factor Estimator at none against Blast Buddy's 2. Power Factor Estimator also leads on update cadence (every 3 days vs every 2 weeks) and iOS requirement (15.4 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. Blast Buddy sells 2 in-app purchases, starting at $2.99 per month. Power Factor Estimator asks for nothing beyond the download.

Power Factor Estimator ships an update every 3 days, Blast Buddy every 2 weeks. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Power Factor Estimator | Blast Buddy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/blast-buddy-shot-timer/id6450191739/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 2 weeks |
| Monetization | **Free** | Freemium |
| Size | 1 MB | 34 MB |
| Requires iOS | **15.4** | 18.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | +17 |
| Developer | [Oleg Udovenko](https://appshunter.io/developer/1626401339) | [ENDCODE SRL](https://appshunter.io/developer/1463286939) |

## What reviewers say

### Power Factor Estimator

[App page](https://appshunter.io/ios/app/power-factor-estimator/id1626401337)

This app calculates power factor, average velocity, and velocity spread from projectile weight and velocity data. It allows users to input velocities, view minimum and maximum values, and manage data through add, remove, clear, and reset functions.

**Highlights:** Calculate Power Factor, Calculate Average Velocity, Calculate Velocity Spread, View Min/Max Velocity, Add Velocity Data, Remove Velocity Data, Clear Velocity Table

**Features:** macOS Compatibility

**In-app purchases:** none


### Blast Buddy

[App page](https://appshunter.io/ios/app/blast-buddy-shot-timer/id6450191739)

This app acts as a shot timer and training companion for competitive shooters and airsoft players. It allows users to time drills, film runs, and analyze performance data. Features include a par timer, video analysis with overlays, multi-angle editing, stage building, and AI coaching.

**Highlights:** Free shot timer with unlimited shots, Par timer for hands-free training, Video analysis with timer overlays, Multi-angle video editing, Stage builder with 3D and AR, AI personal coach for drill recommendations, Performance analytics and competition scoring

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $2.99 | per month |
| Yearly | $19.99 | per year |


## Frequently asked questions

### Is Power Factor Estimator free?

Power Factor Estimator is free to download, with no in-app purchases.

### Is Blast Buddy free?

Blast Buddy is free to download, with in-app purchases available.

### Do Power Factor Estimator or Blast Buddy have ads?

Neither Power Factor Estimator nor Blast Buddy shows ads.

### Which is updated more often, Power Factor Estimator or Blast Buddy?

Power Factor Estimator ships an update every 3 days, and Blast Buddy every 2 weeks. Most recently, Power Factor Estimator was updated on November 3, 2026 and Blast Buddy on November 7, 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.*