# ISO to Go vs Vigenere Shift Plus

The clearest difference is price: ISO to Go at Free against Vigenere Shift Plus's $0.99. ISO to Go also leads on rating (4.3 vs 3.3) and ratings volume (16 vs 3). Vigenere Shift Plus's advantage is iOS requirement (13.0 vs 15.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

ISO to Go is free to download; Vigenere Shift Plus costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ISO to Go holds the better App Store score, 4.3 against 3.3. That said, the two scores are not equally well evidenced: ISO to Go has 16 ratings behind it against 3, so its average is the more settled of the two.

ISO to Go ships an update every 2 months, Vigenere Shift Plus every 3 months. The most recent releases landed on September 16, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | ISO to Go | Vigenere Shift Plus |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.3 (16 ratings)](https://appshunter.io/ios/app/iso-to-go/id555114876/reviews)** | [3.3 (3 ratings)](https://appshunter.io/ios/app/vigenere-shift-plus/id951306959/reviews) |
| Number of ratings | **16** | 3 |
| Positive reviews | 55.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | **Free** | Paid |
| Size | 27 MB | 6 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [ISO New England Inc.](https://appshunter.io/developer/555114879) | [a Rausa](https://appshunter.io/developer/638439637) |

## What reviewers say

### ISO to Go

[App page](https://appshunter.io/ios/app/iso-to-go/id555114876)

Understand the New England power grid with real-time data on electricity prices, system status, and fuel mix. Get customizable alerts for grid changes and their impact on wholesale prices.

**Highlights:** Wholesale electricity price data, Real-time power system status, Customizable notifications, Electricity demand data, Energy source breakdown, Geolocation pricing

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

**In-app purchases:** none


### Vigenere Shift Plus

[App page](https://appshunter.io/ios/app/vigenere-shift-plus/id951306959)

Encrypt and decrypt text messages using the Vigenère cipher. This application provides a straightforward tool for applying this historical encryption method to your messages.

**Highlights:** Encrypt messages, Decrypt messages, Vigenère cipher implementation, Simple user interface, Text encryption tool

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ISO to Go free?

ISO to Go is free to download, with no in-app purchases.

### Is Vigenere Shift Plus free?

Vigenere Shift Plus costs $0.99, with no in-app purchases.

### Which has better reviews, ISO to Go or Vigenere Shift Plus?

ISO to Go is rated higher. ISO to Go averages 4.3 out of 5 from 16 ratings, while Vigenere Shift Plus averages 3.3 from 3 ratings.

### Do ISO to Go or Vigenere Shift Plus have ads?

Neither ISO to Go nor Vigenere Shift Plus shows ads.

### Which is updated more often, ISO to Go or Vigenere Shift Plus?

ISO to Go ships an update every 2 months, and Vigenere Shift Plus every 3 months. Most recently, ISO to Go was updated on September 16, 2026 and Vigenere Shift Plus on September 8, 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.*