# FPL vs GTP API Gravity Calculator2

The clearest difference is review sentiment: GTP API Gravity Calculator2 at 100% against FPL's 41%. GTP API Gravity Calculator2 also leads on iOS requirement (12.0 vs 16.6). FPL's advantage is price (Free vs $9.99) and rating (4.5 vs 4.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

FPL is free to download; GTP API Gravity Calculator2 costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

FPL holds the better App Store score, 4.5 against 4.0. That said, the two scores are not equally well evidenced: FPL has 23K ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 41% of FPL's written reviews are positive against 100% of GTP API Gravity Calculator2's, so the app with the better star average is not the one people write more warmly about.

FPL ships an update every 6 weeks, GTP API Gravity Calculator2 every 2 months. The most recent releases landed on October 14, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | FPL | GTP API Gravity Calculator2 |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | **[4.5 (23K ratings)](https://appshunter.io/ios/app/fpl/id1237328534/reviews)** | [4.0 (1 ratings)](https://appshunter.io/ios/app/gtp-api-gravity-calculator2/id6742924006/reviews) |
| Number of ratings | **23K** | 1 |
| Positive reviews | 41.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | **Free** | Paid |
| Best chart rank | **#132** | — |
| Size | 96 MB | 9 MB |
| Requires iOS | 16.6 | **12.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [NextEra Energy, Inc](https://appshunter.io/developer/1161427573) | [Gammon Technical Products](https://appshunter.io/developer/1163782116) |

## What reviewers say

### FPL

[App page](https://appshunter.io/ios/app/fpl/id1237328534)

**Currently charting:** #132 Top Free · Utilities (US App Store)

Manage your electricity account securely with biometric login. Report outages, track restoration, and receive bill notifications. Monitor energy usage and view projected costs.

**Highlights:** Biometric account access, Report and track power outages, Real-time bill notifications, Projected monthly bill amounts, Energy usage tracking, View and download bills, Account profile management

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

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use and navigate
- 🚀 Efficient app performance
- 💡 Useful features like usage tracking and billing
- 🔒 Secure login and account management
- 📈 Helpful data visualization and analytics

**What reviewers complain about**

- 🐛 Occasional bugs and crashes
- ⏱️ Slow app response times
- 🔒 Overly restrictive security measures for some users
- 💸 Concerns about high electricity rates and billing practices

**Reported bugs**

- Login issues and account management problems
- Unreliable app performance and stability
- Inaccurate or missing data in usage and billing sections

**Requested features**

- Allow more customization and personalization options
- Improve outage reporting and restoration updates
- Provide more detailed usage history and forecasting
- Offer better support and communication channels


### GTP API Gravity Calculator2

[App page](https://appshunter.io/ios/app/gtp-api-gravity-calculator2/id6742924006)

This application calculates the corrected API gravity at 60°F for jet, gasoline, and diesel fuels. It also determines the total weight of the fuel. It's a digital replacement for physical slide calculators.

**Highlights:** Corrected API gravity calculation, Total fuel weight calculation, Supports jet, gasoline, and diesel fuels, Digital version of slide calculators, Developed in 2025

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

**In-app purchases:** none


## Frequently asked questions

### Is FPL free?

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

### Is GTP API Gravity Calculator2 free?

GTP API Gravity Calculator2 costs $9.99, with no in-app purchases.

### Which has better reviews, FPL or GTP API Gravity Calculator2?

FPL is rated higher. FPL averages 4.5 out of 5 from 23K ratings, while GTP API Gravity Calculator2 averages 4.0 from 1 ratings.

### Do FPL or GTP API Gravity Calculator2 have ads?

Neither FPL nor GTP API Gravity Calculator2 shows ads.

### Which is updated more often, FPL or GTP API Gravity Calculator2?

FPL ships an update every 6 weeks, and GTP API Gravity Calculator2 every 2 months. Most recently, FPL was updated on October 14, 2026 and GTP API Gravity Calculator2 on September 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.*