# Bwine Drone vs String Tension Calc

The clearest difference is in-app purchases: Bwine Drone at none against String Tension Calc's 4. Bwine Drone also leads on iOS requirement (9.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. String Tension Calc sells 4 in-app purchases, starting at $2.99 per 7 days. Bwine Drone asks for nothing beyond the download.

Bwine Drone ships an update monthly, String Tension Calc every 3 weeks. The most recent releases landed on October 20, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Bwine Drone | String Tension Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.6 (42 ratings)](https://appshunter.io/ios/app/bwine-drone/id1566691900/reviews)** | — |
| Number of ratings | **42** | — |
| Positive reviews | 36.4% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 176 MB | 44 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Shenzhen Coolle Chaowan Technology Co.,Ltd.](https://appshunter.io/developer/1657588043) | [Vasilii Polovnikov](https://appshunter.io/developer/1716165883) |

## What reviewers say

### Bwine Drone

[App page](https://appshunter.io/ios/app/bwine-drone/id1566691900)

Connect your drone via Wi-Fi to view real-time aerial footage on your mobile device. Remotely control drone movements and capture stunning visuals from above.

**Highlights:** Wi-Fi drone connection, Real-time image display, Remote drone control, Aerial photography, FPV streaming

**Features:** macOS Compatibility

**In-app purchases:** none


### String Tension Calc

[App page](https://appshunter.io/ios/app/string-tension-calc/id6792709631)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $2.99 | per 7 days |
| Premium | $3.99 | per month |
| Premium | $5.99 | per year |
| Lifetime | $7.99 | one-time |


## Frequently asked questions

### Is Bwine Drone free?

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

### Is String Tension Calc free?

String Tension Calc is free to download, with in-app purchases available.

### Do Bwine Drone or String Tension Calc have ads?

Neither Bwine Drone nor String Tension Calc shows ads.

### Which is updated more often, Bwine Drone or String Tension Calc?

Bwine Drone ships an update monthly, and String Tension Calc every 3 weeks. Most recently, Bwine Drone was updated on October 20, 2026 and String Tension Calc on October 13, 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.*