# Rayvolt EIVA USA vs Balansize

The clearest difference is rating: Balansize at 5.0 against Rayvolt EIVA USA's 4.5. Balansize also leads on review sentiment (100% vs 67%) and update cadence (every 2 weeks vs every 2 months). Rayvolt EIVA USA's advantage is in-app purchases (none vs 10) and ratings volume (4 vs 1). On price, ads and device support there is nothing between them.

Both are free to download. Balansize sells 10 in-app purchases, starting at $10.00 per month. Rayvolt EIVA USA asks for nothing beyond the download.

Balansize holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 4 and 1 respectively. Written reviews point the same way: 67% of Rayvolt EIVA USA's written reviews are positive against 100% of Balansize's.

Rayvolt EIVA USA ships an update every 2 months, Balansize every 2 weeks. The most recent releases landed on September 10, 2026 and June 12, 2026 respectively.

## The numbers

| Metric | Rayvolt EIVA USA | Balansize |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (4 ratings)](https://appshunter.io/ios/app/rayvolt-eiva-usa/id1382731508/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/balansize/id6746806336/reviews)** |
| Number of ratings | **4** | 1 |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | **Free** | Freemium |
| Size | 29 MB | 70 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Exxite Bike S.L](https://appshunter.io/developer/1187986626) | [Balansize LLC](https://appshunter.io/developer/1821365990) |

## What reviewers say

### Rayvolt EIVA USA

[App page](https://appshunter.io/ios/app/rayvolt-eiva-usa/id1382731508)

Control and customize your electric bike's performance with this app. Monitor real-time data like speed and battery, and adjust advanced settings for acceleration and pedal assistance.

**Highlights:** Real-time bike data monitoring, Adjustable pedal assistance, Customizable acceleration settings, Bluetooth device connection, Advanced voltage adjustments

**Features:** macOS Compatibility

**In-app purchases:** none


### Balansize

[App page](https://appshunter.io/ios/app/balansize/id6746806336)

This app offers personalized wellness programs designed by experts to support women's health journeys. It provides tailored guidance from psychologists, nutritionists, and coaches to address unique challenges and adapt to evolving well-being needs.

**Highlights:** Custom wellness programs, Expert guidance, Personalized health journey, Support for women's unique needs, Adaptive wellness solutions

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Basic Monthly | $10.00 | per month |
| Premium Monthly | $18.00 | per month |
| Basic Yearly | $100.00 | per year |
| Premium Yearly | $179.99 | per year |
| Ten Dollars | $10.00 | one-time |
| Twenty Dollars | $20.00 | one-time |
| Thirty Five Dollars | $35.00 | one-time |
| Fifty Dollars | $50.00 | one-time |
| Hundred Dollars | $100.00 | one-time |
| One Hundred and Fifty Dollars | $150.00 | one-time |


## Frequently asked questions

### Is Rayvolt EIVA USA free?

Rayvolt EIVA USA is free to download, with no in-app purchases.

### Is Balansize free?

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

### Which has better reviews, Rayvolt EIVA USA or Balansize?

Balansize is rated higher. Rayvolt EIVA USA averages 4.5 out of 5 from 4 ratings, while Balansize averages 5.0 from 1 ratings.

### Do Rayvolt EIVA USA or Balansize have ads?

Neither Rayvolt EIVA USA nor Balansize shows ads.

### Which is updated more often, Rayvolt EIVA USA or Balansize?

Rayvolt EIVA USA ships an update every 2 months, and Balansize every 2 weeks. Most recently, Rayvolt EIVA USA was updated on September 10, 2026 and Balansize on June 12, 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.*