FuelMizer vs Countdown 321
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FuelMizer
Accurately measure the fuel level in partially used canisters and estimate the number of meals you can prepare with the remaining fuel. Utilizes a standard kitchen scale and offers preloaded data for common brands and stoves, with the ability to add custom entries.
- Accurate fuel level measurement
- Estimate meals from remaining fuel
- Supports common brands and sizes
- Add custom canister and stove data
- Utilizes a standard kitchen scale
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Now you can accurately measure the fuel level of any partially used canister with Fuel Mizer. You can also estimate how many meals you can make with that remaining fuel. All you need is a standard kitchen scale! Preloaded with data for many common brands and sizes of canisters and many common backpacking stoves. You can also add and edit custom canister and stove data.
Countdown 321
Track time until future events or elapsed time since past milestones. Customize with personal photos and colors, and share your countdowns as images. Receive notifications for important dates and import birthdays automatically.
- Countdown and count-up tracking
- Customizable widgets for home and lock screens
- Personalized backgrounds and styles
- Event notifications and milestone alerts
- Birthday import from contacts
- Shareable countdown images
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Make Every Moment Count Whether you’re counting down to something exciting or remembering something special, Countdown 321 helps you celebrate every moment, big or small One-Time Purchase. No Subscriptions. No Surprises. ----- Countdown or Count-Up ----- Track the time left until your next big event - or how long it’s been since a meaningful moment. ----- Gorgeous widgets, everywhere ----- View countdowns within the app, or add stunning countdowns to your home screen, lock screen, and standby mode, with customizable widgets in 3 different sizes ----- Make it yours ----- * Choose custom background colors or use your own photos - Pick from multiple unique styles to match your mood or the moment - Share countdowns as beautiful images ready for social media ----- Smarter Celebrations ----- - Set countdowns to repeat every week, month, year, or even every few years - Get notifications for upcoming events and special milestones - Import birthdays from your Contacts automatically ----- Celebrate Together ----- - Share countdowns with friends and family - Keep track of shared milestones together - Share countdowns instantly to your favorite social media as images Whether it’s a birthday, a concert, a trip, an anniversary, or something just for you, Countdown 321 makes tracking time feel meaningful, fun, and completely yours No subscriptions. No ads. Just one purchase for everything.
Screenshots
Verdict
The clearest difference is in-app purchases: FuelMizer at none against Countdown 321's 4. FuelMizer also leads on iOS requirement (13.0 vs 18.6). Countdown 321's advantage is update cadence (every 5 months vs every 27 months). 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. Countdown 321 sells 4 one-off in-app purchases. FuelMizer asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for FuelMizer against 5.0 for Countdown 321. Both are backed by a comparable volume of ratings — 3 and 2 respectively.
FuelMizer ships an update every 27 months, Countdown 321 every 5 months. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.
| Parameter | FuelMizer | Countdown 321 |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) | 5.0 (2 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 3 — better | 2 |
| Update frequency | Every 27 months | Every 5 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 2 MB | 61 MB |
| Age rating | 4+ | 4+ |
| Developer | LocoDog Design LLC | Later Creative LLC |
Customer experience
FuelMizer
Countdown 321
In-app purchases
FuelMizer
No in-app purchases
Countdown 321
- Bread-sized tip$1.99
- Full Version$2.99
- Peanut Butter-Sized Tip$2.99
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- Jam-Sized Tip$3.99
Questions
Is FuelMizer free?
Is Countdown 321 free?
Which has better reviews, FuelMizer or Countdown 321?
Do FuelMizer or Countdown 321 have ads?
Which is updated more often, FuelMizer or Countdown 321?
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