Comparison

ChemSpark vs Stacked Studying

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

Head to head
About

ChemSpark

Master chemistry concepts and prepare for exams with this comprehensive study tool. It offers a dynamic way to test knowledge across various topics, featuring diverse question types, visual learning aids, and detailed feedback to track progress and improve understanding.

Highlights
  • Extensive question bank with varying difficulty
  • Multiple question types (multiple-choice, fill-in-the-blank)
  • Visual learning aids with images and diagrams
  • Detailed feedback and answer explanations
  • Structured learning by subject and topic
  • Progress tracking and score monitoring
  • Interactive testing interface
Features
Read full description

Struggling with Chemistry? Ace your AP, high school, or college exams with ChemSpark! Access hundreds of interactive questions, visual diagrams, and detailed explanations to master everything from the Periodic Table to Organic Chemistry. Key Features: Extensive Question Bank: Practice with a diverse set of questions covering numerous chemistry topics, complete with varying difficulty levels (easy, medium, hard). Multiple Question Types: Challenge yourself with different formats, including multiple-choice and fill-in-the-blank questions. Visual Learning: Enhance your understanding with questions that include relevant images and diagrams. Detailed Feedback: After completing a test, review your performance, see your score, and understand the reasoning behind answers with clear explanations for each question. Structured Learning: Navigate easily through well-organized subjects and topics to focus on specific areas of study. Interactive Testing: Experience a smooth and intuitive testing interface that allows you to select answers, move between questions, and receive immediate feedback upon test completion. Track Your Progress: Monitor your scores on tests to identify areas of strength and opportunities for improvement. Flexible Practice: Quit tests anytime or complete them to see your full results. Whether you're a high school student gearing up for exams, a college student tackling challenging coursework, or simply an enthusiast looking to refresh your chemistry knowledge, ChemSpark is your perfect study companion. Our "Recommended" section will also guide you to further resources and tools to enhance your learning journey! Download ChemSpark today and start your journey to chemistry mastery! Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Stacked Studying

This app employs the Pomodoro technique to foster effective study habits and enhance knowledge retention. It integrates study timers and automatic break timers, allowing for customizable durations to suit individual needs. The app offers a free amino acid quiz and over 1500 practice MCAT questions.

Highlights
  • Pomodoro study timer
  • Automatic break timers
  • Customizable timer settings
  • Amino acid quiz
  • 1500+ MCAT practice questions
Features
Read full description

Stacked Studying uses the Pomodoro study method to build better habits and strengthen knowledge retention. Timers and breaks are built into the app, so don't worry about setting a separate timer on another device. Once the study timer ends, your break timer automatically starts! Change your settings as needed to fine-tune your study habits, taking longer or shorter breaks as needed. Built for pre-meds, users have access to an amino acid quiz and over 1500 practice MCAT questions for free!

Screenshots

ChemSpark4 screens
Stacked Studying4 screens

Verdict

The call

The clearest difference is in-app purchases: Stacked Studying at none against ChemSpark's 5. Stacked Studying also leads on ads (none vs shown) and update cadence (every 2 days vs monthly). ChemSpark's advantage is ratings volume (8 vs 2). 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. ChemSpark sells 5 one-off in-app purchases. Stacked Studying asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Stacked Studying holds the better App Store score, 5.0 against 4.6. Both are backed by a comparable volume of ratings — 8 and 2 respectively.

UpkeepUpdate frequency

ChemSpark ships an update monthly, Stacked Studying every 2 days. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.

Scorecard6 real differences · 4 level
ChemSpark versus Stacked Studying: the parameters behind the verdict, then further details
ParameterChemSparkStacked Studying
PriceFreeFree
Rating4.6 (8 ratings)5.0 (2 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings8 — better2
Update frequencyMonthlyEvery 2 days — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPadiPhone, iPad, Mac — better
Requires iOS17.617.6
Further details — not scored
Size43 MB18 MB
Age rating4+4+
DeveloperLojas Software CorpJosh Britton

Customer experience

ChemSpark

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Stacked Studying

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

5 purchases

ChemSpark

One-time5
  • Test Tube of Hints (25)$0.99
  • Combustion Skips (5)$0.99
  • Atomic Skips (15)$1.99
Show 2 more
  • Beaker of Hints (60)$2.99
  • Flask of Hints (150)$4.99
None

Stacked Studying

No in-app purchases

Questions

Is ChemSpark free?
ChemSpark is free to download, with in-app purchases available.
Is Stacked Studying free?
Stacked Studying is free to download, with no in-app purchases.
Which has better reviews, ChemSpark or Stacked Studying?
Stacked Studying is rated higher. ChemSpark averages 4.6 out of 5 from 8 ratings, while Stacked Studying averages 5.0 from 2 ratings.
Do ChemSpark or Stacked Studying have ads?
ChemSpark shows ads; Stacked Studying does not.
Which is updated more often, ChemSpark or Stacked Studying?
ChemSpark ships an update monthly, and Stacked Studying every 2 days. Most recently, ChemSpark was updated on October 24, 2026 and Stacked Studying on October 31, 2026.

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