Comparison

Acid Base Salt Practice vs Spaced.

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

Head to head
About

Acid Base Salt Practice

Features
Read full description

Acid Base Salt Practice is an educational application designed to help students prepare for NEET and JEE examinations through structured practice in acid–base chemistry and ionic equilibrium. The app provides chapter-wise quizzes, mock tests, and daily practice questions aligned with competitive exam syllabi. Students can solve conceptual and numerical problems, attempt mock tests for comprehensive assessment, and monitor performance using statistics. The app supports systematic revision and exam-focused practice in physical chemistry. Topics Included 1. Fundamental Concepts of Acids and Bases Arrhenius, Brønsted–Lowry, and Lewis theories, acidic and basic strength, and amphoteric substances. 2. Ionization and Dissociation Degree of ionization, Ostwald dilution law, ionization constants (Ka and Kb), pKa and pKb, and common ion effect. 3. pH and pOH Concept Definition of pH and pOH, pH scale, pH–pOH relation, strong and weak acid pH calculations. 4. Buffer Solutions Acidic and basic buffers, Henderson equation, buffer action mechanism, buffer capacity, and numerical problems. 5. Hydrolysis of Salts Salt hydrolysis, hydrolysis constant, pH of salt solutions, acidic and basic salts, and numerical calculations. 6. Acid–Base Titrations Neutralization reactions, equivalence and end points, indicators, strong acid–strong base titration, and numerical problems. 7. Ionic Equilibrium – Advanced Concepts Water ionization, ionic product (Kw), solubility product (Ksp), common ion effect, precipitation conditions, and pH during titration. 8. NEET & JEE Advanced Focus Mixed equilibrium problems, hydrolysis numericals, buffer and titration curve analysis, logarithmic approximations, assertion–reason questions, and frequently tested competitive concepts. Key Features Chapter-wise practice quizzes Mock tests for full syllabus assessment Daily quiz for regular revision Performance statistics to track accuracy NEET & JEE aligned chemistry syllabus Simple and distraction-free interface Acid Base Salt Practice is suitable for students preparing for NEET and JEE who want structured practice in ionic equilibrium, pH calculations, buffer systems, and titration concepts.

About

Spaced.

This minimalist flashcard app helps you remember information through spaced repetition. Create custom decks with text, images, or audio, and review efficiently by focusing on what you need to learn. It's designed for privacy with no ads or tracking.

Highlights
  • Spaced repetition learning
  • Customizable decks
  • Text, image, and audio cards
  • AI-assisted deck creation
  • Starter decks included
  • Private by design, no ads or tracking
Features
Read full description

Remember what you learn, one card at a time. Spaced. is a minimalist flashcard app for iPhone and iPad. Create decks for languages, classes, trivia, lyrics, work concepts, or anything else you want to keep in memory. Review with spaced repetition, and Spaced. brings each card back when it matters most. Why Spaced.? • Study less, remember more Cards you know well come back later. Cards you miss return sooner. Your sessions stay focused on what needs attention. • Simple, fast reviews Flip a card, recall the answer, then swipe right if you remembered or left if you missed it. No clutter, streak pressure, or complicated setup. • Make the decks you actually need Create your own collections, decks, and cards with text, images, and audio. Reorder things, search decks, and track progress per deck. • AI-assisted deck creation Use an AI assistant you already have to draft a deck. Paste the JSON into Spaced., review the cards, and add it to your library. Spaced. does not run AI inference or require an AI account. • Starter decks included Begin with built-in French, Indonesian, and Japanese decks, including Japanese kana with pronunciation audio. • Private by design No ads. No tracking. No Spaced. account. Your user-created decks and progress stay on your device and can sync through your private iCloud account. Spaced. is free to use, with optional one-time tips for people who want to support development.

Screenshots

Acid Base Salt Practice4 screens
Spaced.4 screens

Verdict

The call

The clearest difference is in-app purchases: Acid Base Salt Practice at none against Spaced.'s 2. Acid Base Salt Practice also leads on iOS requirement (13.0 vs 18.0). On price, ads and device support 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. Spaced. sells 2 one-off in-app purchases. Acid Base Salt Practice asks for nothing beyond the download.

Scorecard2 real differences · 7 level
Acid Base Salt Practice versus Spaced.: the parameters behind the verdict, then further details
ParameterAcid Base Salt PracticeSpaced.
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequency—Every 5 months
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better18.0
Further details — not scored
Size27 MB6 MB
Age rating12+4+
DeveloperManish KumarClement Boissiere

In-app purchases

None

Acid Base Salt Practice

No in-app purchases

2 purchases

Spaced.

One-time2
  • Small Tip$4.99
  • Large Tip$9.99

Questions

Is Acid Base Salt Practice free?
Acid Base Salt Practice is free to download, with no in-app purchases.
Is Spaced. free?
Spaced. is free to download, with in-app purchases available.
Do Acid Base Salt Practice or Spaced. have ads?
Neither Acid Base Salt Practice nor Spaced. shows ads.

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