# e85Cal vs HF Storage

e85Cal and HF Storage both sit at 4.7 stars, but that hides the real split: 83% of e85Cal's written reviews are positive against 0% of HF Storage's. e85Cal also leads on update cadence (every 4 months vs every 14 months) and iOS requirement (12.1 vs 14.0). On price, rating, ratings volume and ads 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 — 4.7 for e85Cal against 4.7 for HF Storage. Both are backed by a comparable volume of ratings — 37 and 88 respectively. Written reviews are what separate them: 83% of e85Cal's written reviews are positive against 0% of HF Storage's.

e85Cal ships an update every 4 months, HF Storage every 14 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | e85Cal | HF Storage |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (37 ratings)](https://appshunter.io/ios/app/e85cal/id1470313135/reviews)** | [4.7 (88 ratings)](https://appshunter.io/ios/app/hf-storage/id1551906622/reviews) |
| Number of ratings | 37 | **88** |
| Positive reviews | **83.3% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 14 months |
| Monetization | Free | Free |
| Size | 15 MB | 49 MB |
| Requires iOS | **12.1** | 14.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Michael Joe](https://appshunter.io/developer/1132486512) | [Thomas Fisher](https://appshunter.io/developer/1551906624) |

## What reviewers say

### e85Cal

[App page](https://appshunter.io/ios/app/e85cal/id1470313135)

This app assists users in calculating the precise amounts of standard and ethanol gasoline needed to achieve a desired ethanol percentage in their fuel mix. It simplifies the process by taking into account tank size, current fuel level, and the ethanol content of available fuel types.

**Highlights:** Calculate ethanol percentage goal, Enter gas tank size, Input standard pump gas ethanol %, Input ethanol pump gas ethanol %, Set target ethanol % mix, Enter current fuel level %

**Features:** macOS Compatibility

**In-app purchases:** none


### HF Storage

[App page](https://appshunter.io/ios/app/hf-storage/id1551906622)

Manage your self-storage unit conveniently and securely from your smartphone. Rent new units, pay bills, and access select locations with ease. Simplify your storage experience with this powerful management tool.

**Highlights:** Rent new units in real-time, Pay monthly bills easily, Open main gate at select locations, View outstanding balance, Notify management of move-out, Fingerprint authorization for login

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is e85Cal free?

e85Cal is free to download, with no in-app purchases.

### Is HF Storage free?

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

### Which has better reviews, e85Cal or HF Storage?

e85Cal is rated higher. e85Cal averages 4.7 out of 5 from 37 ratings, while HF Storage averages 4.7 from 88 ratings.

### Do e85Cal or HF Storage have ads?

Neither e85Cal nor HF Storage shows ads.

### Which is updated more often, e85Cal or HF Storage?

e85Cal ships an update every 4 months, and HF Storage every 14 months. Most recently, e85Cal was updated on November 3, 2026 and HF Storage on November 3, 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.*