Comparison

Fullscreen Clock vs Molecule Simulator

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Fullscreen Clock

Transform your device into a stylish flip clock that doubles as a productivity tool. Enhance your workspace with aesthetic widgets and utilize the integrated focus timer for improved concentration during study or work sessions.

Highlights
  • Iconic flip clock animation
  • Deep focus timer (Pomodoro/custom)
  • Stunning home screen widgets
  • Elegant and minimalist interface
  • Extensive customization options
  • Versatile timers and stopwatch
  • Floating clock for iPadOS
Features
Read full description

It's not just a clock. It's a statement piece. Transform your device into a stunning Flip Clock, the perfect centerpiece for your desk setup. More than just aesthetics, it's a powerful tool designed to help you focus, study, and seize every second. BEAUTY MEETS PRODUCTIVITY We believe your most personal device deserves more than a boring clock. Fullscreen Clock combines minimalist design with powerful productivity features to create an experience that is both beautiful and functional. ICONIC FLIP CLOCK: Enjoy the satisfying, classic animation of a retro flip clock, reborn with a modern, clean design. It's the ultimate accessory for your Gong-stagram study sessions and aesthetic workspace photos. DEEP FOCUS TIMER: Crush your goals with our integrated focus timer. Use the Pomodoro Technique or set custom sessions to improve concentration during study, work, or meditation. STUNNING WIDGETS: Your clock shouldn't be trapped inside an app. Add our beautifully designed widgets to your Home Screen for an instant, stylish time check. FEATURES YOU'LL LOVE: Elegant & Minimalist Interface: A clean, distraction-free design that puts the focus on time. Extensive Customization: Personalize your clock with different themes, sizes, and even your own background photos. Versatile Timers & Stopwatch: From a simple countdown to a precision stopwatch, we have all your timing needs covered. Floating Clock (iPadOS): Keep track of time with a clock that floats above your other apps – perfect for multitasking.

About

Molecule Simulator

Visualize the 3D structures of molecules using data from PubChem and Protein Data Bank. Explore molecules in various viewing modes and download an extensive library of compounds.

Highlights
  • 3D molecular visualization
  • Space filling mode
  • Ball-and-stick mode
  • Data from PubChem
  • Data from Protein Data Bank
  • Downloadable molecule library
Features
Read full description

This app is a molecular viewer. With the data on PubChem and Protein Data Bank, it can show us 3D structure of molecules. Both space filling mode and ball-and-stick mode. --------------------------------------------- Contains some pre-installed modes. And you can download all kinds of molecules from PubChem or Protein Data Bank.

Screenshots

Fullscreen Clock4 screens
Molecule Simulator4 screens

Verdict

The call

The clearest difference is in-app purchases: Molecule Simulator at none against Fullscreen Clock's 1. Molecule Simulator also leads on ads (none vs shown) and review sentiment (100% vs 76%). Fullscreen Clock's advantage is update cadence (every 8 days vs every 4 months) and rating (4.7 vs 4.3). On price, device support and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Fullscreen Clock sells 1 one-off in-app purchase. Molecule Simulator asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Fullscreen Clock holds the better App Store score, 4.7 against 4.3. That said, the two scores are not equally well evidenced: Fullscreen Clock has 2.2K ratings behind it against 24, so its average is the more settled of the two. Written reviews complicate that: 76% of Fullscreen Clock's written reviews are positive against 100% of Molecule Simulator's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Fullscreen Clock ships an update every 8 days, Molecule Simulator every 4 months. The most recent releases landed on September 29, 2026 and September 21, 2026 respectively.

Scorecard7 real differences · 3 level
Fullscreen Clock versus Molecule Simulator: the parameters behind the verdict, then further details
ParameterFullscreen ClockMolecule Simulator
PriceFreeFree
Rating4.7 (2.2K ratings) — better4.3 (24 ratings)
Positive reviews75.9% of reviews100.0% of reviews — better
Number of ratings2.2K — better24
Update frequencyEvery 8 days — betterEvery 4 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size18 MB8 MB
Age rating4+4+
DeveloperShenzhen Gude Aipu Technology Co., Ltd仕清 刘

Customer experience

Fullscreen Clock

All ratings2,175 ratings
Positive93.3%
Neutral2.7%
Negative4.0%
Written reviews245 reviews
Positive75.9%
Neutral8.6%
Negative15.5%

Molecule Simulator

All ratings22 ratings
Positive86.4%
Neutral0.0%
Negative13.6%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Fullscreen Clock

Reported bugs

4 issues
  • Widget doesn't adjust for DST
  • Clock resets when exiting app
  • Hangs up on some devices
  • Ads cover the clock

Requested features

5 requests
  • Add color customization
  • Integrate date display
  • Add 12-hour time format with AM/PM
  • Improve countdown timer functionality
  • Add stopwatch widget

Molecule Simulator

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Fullscreen Clock

One-time1
  • VIP$0.99
None

Molecule Simulator

No in-app purchases

Questions

Is Fullscreen Clock free?
Fullscreen Clock is free to download, with in-app purchases available.
Is Molecule Simulator free?
Molecule Simulator is free to download, with no in-app purchases.
Which has better reviews, Fullscreen Clock or Molecule Simulator?
Fullscreen Clock is rated higher. Fullscreen Clock averages 4.7 out of 5 from 2.2K ratings, while Molecule Simulator averages 4.3 from 24 ratings.
Do Fullscreen Clock or Molecule Simulator have ads?
Fullscreen Clock shows ads; Molecule Simulator does not.
Which is updated more often, Fullscreen Clock or Molecule Simulator?
Fullscreen Clock ships an update every 8 days, and Molecule Simulator every 4 months. Most recently, Fullscreen Clock was updated on September 29, 2026 and Molecule Simulator on September 21, 2026.

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