# Bidirectional vs Billy

The clearest difference is device support: Bidirectional at 3 against Billy's 1. Bidirectional also leads on iOS requirement (15.1 vs 17.0). On price, rating, ratings volume and update cadence there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for Bidirectional against 5.0 for Billy. Both are backed by a comparable volume of ratings — 2 and 3 respectively.

Bidirectional ships an update monthly, Billy every 6 weeks. The most recent releases landed on September 17, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Bidirectional | Billy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/bidirectional/id6448762800/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/billy-split-bills-fairly/id6742382801/reviews) |
| Number of ratings | 2 | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 6 weeks |
| Monetization | Free | Free |
| Size | 103 MB | 7 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Bidirectional Energy, Inc.](https://appshunter.io/developer/1686225288) | [Jonathan Sahoo](https://appshunter.io/developer/970144714) |

## What reviewers say

### Bidirectional

[App page](https://appshunter.io/ios/app/bidirectional/id6448762800)

Optimize your electric vehicle charging to save money and reduce your carbon footprint. This app intelligently schedules charging during off-peak hours and can even discharge your EV to power your home or support the grid, potentially earning you money.

**Highlights:** Schedule charging during cheapest energy rates, Discharge EV to power home, Reduce CO2 emissions, Earn money from utility, Set departure times and battery targets, Track savings and environmental impact

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

**In-app purchases:** none


### Billy

[App page](https://appshunter.io/ios/app/billy-split-bills-fairly/id6742382801)

Effortlessly divide expenses with this tool. Scan receipts or manually input items, then assign them to individuals. It calculates each person's share of costs, including tax and tip, providing clear, transparent breakdowns.

**Highlights:** Scan receipt photos, Manually enter line items, Assign items to individuals, Calculate tax and tip share, Generate per-person totals, Create shareable PDF breakdowns

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Bidirectional free?

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

### Is Billy free?

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

### Which has better reviews, Bidirectional or Billy?

Bidirectional and Billy are both rated 5.0 out of 5 on the App Store, from 2 and 3 ratings respectively.

### Do Bidirectional or Billy have ads?

Neither Bidirectional nor Billy shows ads.

### Which is updated more often, Bidirectional or Billy?

Bidirectional ships an update monthly, and Billy every 6 weeks. Most recently, Bidirectional was updated on September 17, 2026 and Billy 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.*