Comparison

SimDif vs Periodic Table & Element Guide

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

Head to head
About

SimDif

Easily create, edit, and publish professional websites from any device. AI tools assist with writing and optimization, simplifying the process for beginners and pros alike. Connect custom domains and choose from various plans, including a free option.

Highlights
  • AI-powered writing assistance
  • Step-by-step content advisor
  • Cross-device compatibility
  • Optimization Assistant for SEO
  • Customizable themes and forms
  • E-commerce integration
Features
Read full description

Build a professional website with the SimDif website builder, for free, with the same features on your phone, tablet, and computer. Create, edit, and publish a clear, effective site from any device, with AI assistance available when you want it. Where other website builders add complexity, SimDif makes creating your own website as simple as presenting what you already know about your business or activity. AI-powered writing tools and a step-by-step content advisor help you focus on what visitors and search engines need. WHY CHOOSE SIMDIF WEBSITE BUILDER • Same features on phone, tablet, and computer: switch any time. • The Optimization Assistant highlights what's missing in your site so you can publish on the web with confidence. • Kai (optional AI) can proofread and adjust writing style, suggest topic ideas, and refine titles and metadata. • Kai Chat answers your questions instantly, drawing on SimDif's full library of guides and FAQs. • In Pro, Kai can design a complete graphic theme for your site, turn rough notes into polished drafts, learn your own writing style, and help translate multilingual sites. • Professional SEO made simple with the PageOptimizer Pro (POP) integration. • Works for beginners and pros: start simple, grow when you're ready. • Connect a custom domain name from YorName and use it with any SimDif site, even a free site. SIMDIF PLANS (HOSTING INCLUDED) STARTER (Free) • Up to 5 pages • 14 color presets • Buttons for social media, communication apps, and calls to action • Free .simdif.com domain name • Optimization Assistant • Visitor statistics • Keep your free site online by publishing at least once every 6 months. SMART • Up to 12 pages • 56 color presets • Install Analytics • Enable and moderate blog comments • Control how your site is shared on social media • Audio Players: Embed music from Bandcamp, Spotify, Soundcloud, Apple Music and more • In-app hotline to the SimDif team • More shapes, fonts, and customization • Add your site to the SimDif SEO Directory for extra visibility PRO Everything in Smart, plus: • Up to 30 pages • Customizable contact forms • Create and save your own Themes (colors, fonts, shapes, and more), or let Kai Theme Creator design one for you • Password-protected pages • Hide pages from the menu E-COMMERCE SOLUTIONS •• Online stores: integrate a full store (e.g., Ecwid, Sellfy) •• Payment buttons: accept payments (e.g., PayPal, Gumroad) •• Digital downloads: sell files securely MULTILINGUAL SITES • Translate your website (140 languages available) • Create and manage a multilingual website with automatic translation and review FAIR PRICING • With FairDif, SimDif adjusts prices to the cost of living in each country, making upgrades affordable worldwide. LANGUAGES • SimDif's interface and FAQs are available in 45 languages. • You can translate your website into 140 languages with the help of AI. WHO IT'S FOR Small businesses, services, schools, NGOs, and anyone who wants a clear website. GET IN TOUCH Visit our website – https://www.simdif.com – for more information and the latest updates. SUBSCRIPTIONS: SMART & PRO • Subscriptions are charged monthly or yearly to your iTunes Account after the confirmation of purchase. • Subscriptions automatically renew unless auto-renew is turned off at least 24-hours before the end of the current period • Your account will be charged for renewal within 24-hours prior to the end of the current period, showing the cost of the renewal. => You can manage your subscriptions and auto-renewal by going to your iTunes Account Settings after purchase. • SimDif Terms of Use : https://www.simdif.com/en/tos.html

About

Periodic Table & Element Guide

Features
Read full description

Periodic Table is a beautifully designed and easy to use reference app for chemistry students, teachers, and curious minds. Explore all 118 chemical elements in a clean interactive table that works perfectly on iPhone and iPad. Tap any element to instantly see clear and useful information including its symbol, atomic number, category, period, and group. Everything is available offline with no ads and no clutter, just a fast and elegant way to explore chemistry. Features Browse the complete periodic table Tap any element for detailed information Clean modern design optimised for all screen sizes Works fully offline Dark mode support Search elements by name symbol or atomic number Filter by category period or group Save favourite elements for quick access Designed with accessibility in mind Perfect for students revising chemistry, teachers in the classroom, or anyone who wants a simple and reliable periodic table on their device. Subscription Information Some features require a subscription. Payment will be charged to your Apple ID account at confirmation of purchase. Your subscription will automatically renew unless auto renewal is turned off at least 24 hours before the end of the current period. You can manage or cancel your subscription at any time in your App Store account settings. Terms of Service: https://reggielabs.com/terms-of-service Privacy Policy: https://reggielabs.com/privacy-policy

Screenshots

SimDif4 screens
Periodic Table & Element Guide4 screens

Verdict

The call

The clearest difference is device support: SimDif at 4 against Periodic Table & Element Guide's 2. SimDif also leads on iOS requirement (12.0 vs 17). On price, update cadence, ads and in-app purchases 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. SimDif sells 15 in-app purchases, starting at $3.99 per month and Periodic Table & Element Guide sells 2 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

SimDif ships an update monthly, Periodic Table & Element Guide every 3 weeks. The most recent releases landed on October 1, 2026 and September 10, 2026 respectively.

Scorecard2 real differences · 8 level
SimDif versus Periodic Table & Element Guide: the parameters behind the verdict, then further details
ParameterSimDifPeriodic Table & Element Guide
PriceFreeFree
Rating4.7 (1.6K ratings) — better—
Positive reviews81.3% of reviews—
Number of ratings1.6K — better—
Update frequencyMonthlyEvery 3 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad
Requires iOS12.0 — better17
Further details — not scored
Size28 MB8 MB
Age rating4+4+
DeveloperThe Simple Different Company LtdCourtney Rawlings

Bugs and requests

SimDif

Reported bugs

4 issues
  • Verification email not working
  • Inability to upload images
  • Subscription issues and billing problems
  • Compatibility problems with certain browsers

Requested features

5 requests
  • Undo/redo functionality
  • Expanded template library
  • More font and color customization
  • Ability to embed videos and documents
  • Improved SEO and analytics tools

Periodic Table & Element Guide

Not enough reviews yet to summarise bugs or requests.

In-app purchases

15 purchases

SimDif

Subscriptions10
  • Smart features (1 month)$3.991 Month
  • Smart Features (1 month)$7.901 Month
  • Smart Standard (1 month)$8.491 Month
Show 7 more
  • Pro features (1 month)$14.901 Month
  • Pro Standard (1 month)$16.491 Month
  • SimDif SMART _ Annual Payment$38.991 Year
  • Smart Standard (1 year)$59.001 Year
  • Smart Features (1 year)$79.001 Year
  • Pro Standard (1 year)$109.001 Year
  • Pro features (1 year)$149.001 Year
One-time5
  • Pro Renewal for 1 Year SimDif1$39.99
  • 1 Year of Pro features for this site$54.99
  • Smart features (1 year)$59.00
Show 2 more
  • Pro features (1 year)$109.00
  • Pro Standard (1 year)$109.00
2 purchases

Periodic Table & Element Guide

Subscriptions1
  • Periodic Pro Weekly$3.997 Days
One-time1
  • Periodic Pro Lifetime$29.99

Questions

Is SimDif free?
SimDif is free to download, with in-app purchases available.
Is Periodic Table & Element Guide free?
Periodic Table & Element Guide is free to download, with in-app purchases available.
Do SimDif or Periodic Table & Element Guide have ads?
Neither SimDif nor Periodic Table & Element Guide shows ads.
Which is updated more often, SimDif or Periodic Table & Element Guide?
SimDif ships an update monthly, and Periodic Table & Element Guide every 3 weeks. Most recently, SimDif was updated on October 1, 2026 and Periodic Table & Element Guide on September 10, 2026.

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