# RC Speed Calculator Pro vs Gens Ace

The clearest difference is review sentiment: RC Speed Calculator Pro at 100% against Gens Ace's 40%. RC Speed Calculator Pro also leads on rating (4.9 vs 3.4) and ratings volume (23 vs 7). Gens Ace's advantage is iOS requirement (13.0 vs 17.0). On price, update cadence, ads and in-app purchases there is nothing between them.

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

RC Speed Calculator Pro holds the better App Store score, 4.9 against 3.4. Both are backed by a comparable volume of ratings — 23 and 7 respectively. Written reviews point the same way: 100% of RC Speed Calculator Pro's written reviews are positive against 40% of Gens Ace's.

RC Speed Calculator Pro ships an update fortnightly, Gens Ace every 3 weeks. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | RC Speed Calculator Pro | Gens Ace |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (23 ratings)](https://appshunter.io/ios/app/rc-speed-calculator-pro/id6445860835/reviews)** | [3.4 (7 ratings)](https://appshunter.io/ios/app/gens-ace/id6683295995/reviews) |
| Number of ratings | **23** | 7 |
| Positive reviews | **100.0% of reviews** | 40.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | Free | Free |
| Size | 160 MB | 23 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Degree3, Inc.](https://appshunter.io/developer/1497876563) | [Shenzhen Grepow Battery Co.Ltd.](https://appshunter.io/developer/1714028930) |

## What reviewers say

### RC Speed Calculator Pro

[App page](https://appshunter.io/ios/app/rc-speed-calculator-pro/id6445860835)

Estimate your RC car's top speed by inputting details about its gearing, motor, and batteries. Record your estimates and actual speeds to compare different setups.

**Highlights:** Estimate RC car top speed, Input gearing, motor, and battery info, Record speed estimates, Log actual top speeds, Compare different car setups, Pre-filled car data

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

**In-app purchases:** none


### Gens Ace

[App page](https://appshunter.io/ios/app/gens-ace/id6683295995)

Monitor your RC charger and battery status in real-time via Bluetooth. Track charging and discharging progress directly from your iPhone or iPad. Designed for hobbyists and professional racers seeking a safer and smarter power experience.

**Highlights:** Real-time status monitoring, Bluetooth connectivity, Charge and discharge tracking, iPhone and iPad support, Smart power solutions

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

**In-app purchases:** none


## Frequently asked questions

### Is RC Speed Calculator Pro free?

RC Speed Calculator Pro is free to download, with no in-app purchases.

### Is Gens Ace free?

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

### Which has better reviews, RC Speed Calculator Pro or Gens Ace?

RC Speed Calculator Pro is rated higher. RC Speed Calculator Pro averages 4.9 out of 5 from 23 ratings, while Gens Ace averages 3.4 from 7 ratings.

### Do RC Speed Calculator Pro or Gens Ace have ads?

Neither RC Speed Calculator Pro nor Gens Ace shows ads.

### Which is updated more often, RC Speed Calculator Pro or Gens Ace?

RC Speed Calculator Pro ships an update fortnightly, and Gens Ace every 3 weeks. Most recently, RC Speed Calculator Pro was updated on October 22, 2026 and Gens Ace on October 24, 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.*