e85Cal vs HF Storage
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
e85Cal
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.
- 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 %
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e85Cal help you calculate your ethanol percentage goal. It fast, simple, and easy to use. Just enter the following information: 1) How big is your gas tank? 2) What is the ethanol % in the standard pump gas? 3) What is the ethanol % in the ethanol pump gas? 4) What is your target ethanol % mix goal? 5) What is your current ethanol % min in your vehicle? 6) What is your current fuel level % in your vehicle? Results will display how many gallons or liters of standard and ethanol gas to pump in your vehicle based on your input.
HF Storage
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.
- 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
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The HF Storage management App is the easiest and most secure way to rent a new unit. See the pricing and unit availability in real time. Renting a new unit, paying your monthly bill, and the option to open the main gate (at select locations) are just a few of the tasks your app will perform easily, all from your smartphone. Let us help you make life simpler by using our powerful application designed specifically for you, our customer. At select locations, new customers can rent a unit from start to finish with our app in just minutes. Current customers use their unit number and their gate code to login. Key features - Pay bill monthly with 3 clicks. Once a customer has logged in for the first time, they can log in with fingerprint authorization, making access to their information a snap. - Certain locations allow rentals to be performed from this app. You can pay for the unit, easily sign your lease agreement and receive a gate code to obtain access all from our app. - Notify management easily that you are moving out. - Easily see what your outstanding balance is at any time. - and so much more.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | e85Cal | HF Storage |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (37 ratings) — better | 4.7 (88 ratings) |
| Positive reviews | 83.3% of reviews — better | 0.0% of reviews |
| Number of ratings | 37 | 88 — better |
| Update frequency | Every 4 months — better | Every 14 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 12.1 — better | 14.0 |
| Further details — not scored | ||
| Size | 15 MB | 49 MB |
| Age rating | 4+ | 4+ |
| Developer | Michael Joe | Thomas Fisher |
Customer experience
e85Cal
HF Storage
In-app purchases
e85Cal
No in-app purchases
HF Storage
No in-app purchases
