Comparison

iPeriodic for iPhone vs Element OTG

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

Head to head

Chemistry Learning Made Easy

Free

📚 Education

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About

iPeriodic for iPhone

Features

Read full description

แอพฟลิเคชั่นตารางธาตุนี้ (Periodic table) ถูกพัฒนามาเพื่อส่งเสริม และอำนวยความสะดวก ในการเรียนการสอนวิชาเคมีและผู้ที่สนใจศึกษา - สามารถดูตารางธาตุทั้งภาษาไทยและภาษาอังกฤษ - เทคนิคการท่องตารางธาตุ - ดูข้อมูลเพิ่มเติมของธาตุเพียงคลิกเดียว - เพิ่มฟังก์ชั่นการแสดงผลสถานะของธาตุ เมื่ออุณหภูมิเปลี่ยนไปตามที่กำหนด(ทั้งในภาษไทยและภาษาอังกฤษ) - เพิ่มฟังก์ชั่นพิเศษให้สามารถซื้อออฟชั่นสริมเพื่อสนับสนุนนักพัฒนา"ปิดโฆษณา" --- แอพพลิเคชั่นของคนไทย เพื่อคนไทย ---

About

Element OTG

Features

Read full description

• Complete Periodic Table - All 118 elements with detailed information • Interactive Learning Center - Chemistry quizzes and symbol practice • Smart Search & Filter - Find elements by name, symbol, or properties • Dark Mode Support - Choose light, dark, or follow system theme • Responsive Design - Perfect for phones, tablets, and desktops

Screenshots

iPeriodic for iPhone4 screens

Element OTG4 screens

Verdict

The call

The clearest difference is in-app purchases: Element OTG at none against iPeriodic for iPhone's 1. iPeriodic for iPhone's advantage is ads (none vs shown) and update cadence (every 8 days vs monthly). On price 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. iPeriodic for iPhone sells 1 one-off in-app purchase. Element OTG asks for nothing beyond the download.

UpkeepUpdate frequency

iPeriodic for iPhone ships an update every 8 days, Element OTG monthly. The most recent releases landed on October 26, 2026 and October 28, 2026 respectively.

Scorecard4 real differences · 2 level

iPeriodic for iPhone versus Element OTG: the parameters behind the verdict, then further details
Parameter	iPeriodic for iPhone	Element OTG
Price	Free	Free
Update frequency	Every 8 days — better	Monthly
Ads	No — better	Yes
In-app purchases	Yes	No — better
Devices	iPhone, iPod	iPhone, iPad, iPod — better
Requires iOS	6.1 — better	13.0
Further details — not scored
Size	16 MB	25 MB
Age rating	4+	4+
Developer	Thitipong Wongsatho	Japality Limited

In-app purchases

1 purchases

iPeriodic for iPhone

One-time1

Remove Ads ($0.99)$0.99

None

Element OTG

No in-app purchases

Questions

Is iPeriodic for iPhone free?

iPeriodic for iPhone is free to download, with in-app purchases available.

Is Element OTG free?

Element OTG is free to download, with no in-app purchases.

Do iPeriodic for iPhone or Element OTG have ads?

Element OTG shows ads; iPeriodic for iPhone does not.

Which is updated more often, iPeriodic for iPhone or Element OTG?

iPeriodic for iPhone ships an update every 8 days, and Element OTG monthly. Most recently, iPeriodic for iPhone was updated on October 26, 2026 and Element OTG on October 28, 2026.