# Frank Energy vs SPL Reference

The clearest difference is in-app purchases: Frank Energy at none against SPL Reference's 1. Frank Energy also leads on iOS requirement (15.1 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. SPL Reference sells 1 one-off in-app purchase. Frank Energy asks for nothing beyond the download.

Frank Energy ships an update fortnightly, SPL Reference every 2 weeks. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Frank Energy | SPL Reference |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/frank-energy-green-and-smart/id1546000285/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 104 MB | 6 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Frank Energie B.V.](https://appshunter.io/developer/1546000287) | [Direct Sound Records Ltd](https://appshunter.io/developer/1896279797) |

## What reviewers say

### Frank Energy

[App page](https://appshunter.io/ios/app/frank-energy-green-and-smart/id1546000285)

Monitor your home energy usage and receive notifications about electricity price fluctuations. Optimize your consumption to take advantage of cheaper hours and save money on your bill. Supports smart charging for electric cars and home battery management, all powered by 100% renewable energy.

**Highlights:** Monitor energy consumption, Real-time electricity price alerts, Optimize usage for savings, Smart electric car charging, Home battery management, 100% renewable energy sources

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

**In-app purchases:** none


### SPL Reference

[App page](https://appshunter.io/ios/app/spl-reference/id6806757498)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Professional Unlock | $39.99 | one-time |


## Frequently asked questions

### Is Frank Energy free?

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

### Is SPL Reference free?

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

### Do Frank Energy or SPL Reference have ads?

Neither Frank Energy nor SPL Reference shows ads.

### Which is updated more often, Frank Energy or SPL Reference?

Frank Energy ships an update fortnightly, and SPL Reference every 2 weeks. Most recently, Frank Energy was updated on November 3, 2026 and SPL Reference on October 31, 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.*