Comparison

Interactive Photosynthesis vs Equation Encyclopedia

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

Head to head
About

Interactive Photosynthesis

Features
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Plants convert energy from the Sun into chemical energy that animals Through photosynthesis green plants use sunlight to synthesize food. Plants use carbon dioxide and water to create sugars and as a byproduct release oxygen. Generally photosynthesis involves processes that occur in the green pigment chlorophyll and result in the generation of oxygen as a beneficial byproduct. Interactive Photosynthesis leads students through illustrated lessons that explain how photosynthesis works. When students complete a lesson a quiz is presented that to measure their understanding of the material presented. Synthetic speech can be used to read the lessons and quiz questions aloud. Sound effects make using the app fun. A scoreboard shows how well the student did on the quizzes.

About

Equation Encyclopedia

Features
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Master 3,000+ Formulas, 170+ Expert Revision Guides, and AI Study Tools Equation Encyclopedia brings GCSE, A-Level, IB, AP, university, and professional study into one app. Search 3,000+ formulas across Mathematics, Physics, Chemistry, Biology, Engineering, Finance, Geography, Medicine, Computing, Geology, Psychology, Economics, Sociology, and Quantum Computing, with offline access after login. FORMULA LIBRARY - 3,000+ formulas across GCSE, A-Level, IB, AP, and university pathways - Coverage mapped across AQA, Edexcel, OCR, WJEC/Eduqas, Cambridge, IB, AP, and broader UK, US, and international systems - Interactive formula preview with intuition, derivations, rearrangements, mnemonics, comparisons, and step-by-step practice problem solutions EXPERT REVISION GUIDES - 170+ Expert Revision Guides built from formulas, derivations, rearrangements, mnemonics, intuition, history, and practice - 3 free sample guides on the free plan, with the full guide library available on paid plans - Extra spreadsheet, coding, and reference study packs for broader revision workflows 50+ INTERACTIVE GAMES - Equation Zillionaire, Solve It, Unit Crunch, Symbol Rush, Formula Run, Equation Sleuth, Logic Linker, and more - XP levels, daily streaks, achievement badges, and global leaderboards AI-POWERED TOOLS - AI Equation Mentor to explain, rearrange, and solve formulas step by step - AI Image Scanner to identify equations from photos - AI Study Tool, AI guide generation, and AI-assisted calculator building - AI spreadsheet and coding explainers for practical problem solving CREATE, PROGRESS, AND SCIENTISTS - Create page supports typing, uploading handwriting, or drawing equations before sending them through Store AI - Progress includes Equation Skill Check, weak-equation analytics, subject insights, and next-best-study actions - Separate scientist experiences: collect 100 scientist cards in Scientist Collection, then explore 800+ scientists on the broader Scientists Page - Expanded discovery pages, including Timeline and Wiki coverage, for richer browsing across topics and people REFERENCE AND LIFESTYLE TOOLS - Full Periodic Table, Physical Constants, Unit Conversions, Greek Alphabet, and Math Rules - 468+ Did You Know facts and equation-linked historical context - 6 lifestyle and finance calculators: Salary Cost-of-Living Adjuster, Portfolio Growth Planner, Mortgage Cost Planner, Rent vs Buy Comparator, Emergency Fund Planner, and Budget Split Planner PERFECT FOR GCSE, A-Level, IB, AP, university, finance professionals, developers, Excel users, and independent learners UI available in English plus 17 translated languages. Deeper formula, calculator, Excel, coding, and study content is localized across 10 translated data languages. PLANS - Free: full library access, sample Expert Revision Guides, games, and reference tools - Plus: GBP 5.99/month for unlimited saves, full Expert Revision Guide access, create tools, exports, and ad-free study - Pro: GBP 9.99/month for everything in Plus plus AI Mentor, Image Scanner, AI study workflows, and advanced creation tools - Ultra: GBP 14.99/month for everything in Pro plus the highest AI priority and heavier daily AI usage Zero ads on all paid plans. Terms of Use: https://equationencyclopedia.com/terms Privacy Policy: https://equationencyclopedia.com/privacy About Us: https://equationencyclopedia.com/about Idea illustrations by Storyset

Screenshots

Equation Encyclopedia4 screens

Verdict

The call

The clearest difference is price: Equation Encyclopedia at Free against Interactive Photosynthesis's $1.99. Equation Encyclopedia also leads on update cadence (every 4 days vs every 25 months). Interactive Photosynthesis's advantage is in-app purchases (none vs 9) and ads (none vs shown). On device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Equation Encyclopedia is free to download; Interactive Photosynthesis costs $1.99 up front. Equation Encyclopedia sells 9 in-app purchases, starting at $6.99 per month. Interactive Photosynthesis asks for nothing beyond the download.

UpkeepUpdate frequency

Interactive Photosynthesis ships an update every 25 months, Equation Encyclopedia every 4 days. The most recent releases landed on September 10, 2026 and September 8, 2026 respectively.

Scorecard5 real differences ยท 1 level
Interactive Photosynthesis versus Equation Encyclopedia: the parameters behind the verdict, then further details
ParameterInteractive PhotosynthesisEquation Encyclopedia
Price$1.99Free โ€” better
Update frequencyEvery 25 monthsEvery 4 days โ€” better
AdsNo โ€” betterYes
In-app purchasesNo โ€” betterYes
DevicesiPad, Apple TViPhone, iPad, iPod โ€” better
Requires iOS12.0 โ€” better15.0
Further details โ€” not scored
Size183 MB451 MB
Age rating4+4+
DeveloperVentura Educational SystemsSAMUEL MOYOSORE O ADEYIGA

In-app purchases

None

Interactive Photosynthesis

No in-app purchases

9 purchases

Equation Encyclopedia

Subscriptions6
  • Plus Monthly3 Days trial$6.991 Month
  • Pro Monthly$10.991 Month
  • Ultra Monthly$17.991 Month
Show 3 more
  • Plus Yearly3 Days trial$49.991 Year
  • Pro Yearly$99.991 Year
  • Ultra Yearly$149.991 Year
One-time3
  • 10 Energy$0.99
  • 30 Energy$2.99
  • 100 Energy$8.99

Questions

Is Interactive Photosynthesis free?
Interactive Photosynthesis costs $1.99, with no in-app purchases.
Is Equation Encyclopedia free?
Equation Encyclopedia is free to download, with in-app purchases available.
Do Interactive Photosynthesis or Equation Encyclopedia have ads?
Equation Encyclopedia shows ads; Interactive Photosynthesis does not.
Which is updated more often, Interactive Photosynthesis or Equation Encyclopedia?
Interactive Photosynthesis ships an update every 25 months, and Equation Encyclopedia every 4 days. Most recently, Interactive Photosynthesis was updated on September 10, 2026 and Equation Encyclopedia on September 8, 2026.

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