Comparison

iPeriodic for iPhone vs Formula Conversion

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

Head to head
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

Formula Conversion

Features
Read full description

It is a formula conversion application. You can print a formula or a modified formula. You can save unmodified formulas to your phone's storage medium and then open it if necessary. Upgrading An application without an upgrade is limited to 24 formula conversions. If you want to convert the formula more than ten times, you must make an in-app purchase. Creating and opening a formula You can open the formula by clicking the first button on the toolbar. You can create a new formula using the symbols, symbols, numbers, and letters on the keyboard. You can change the font size of letters and symbols by pressing the "alp." Or "ALP." And "sym." Or "SYM." Buttons on the toolbar. If you wish, you can delete the characters by pressing the "del." Key. And use the arrows to move between the elements of the formula. Formatting the formula You can format the formula by first selecting the characters you want to change. The selection key is "Sel.", And you can then select by scrolling between the elements of the formula or by pressing the finger on the desired character. You can format the selected formula by pressing the second button on the toolbar from the back. You can change the font, font size, font, and font color Saving and printing the sample You can save the formula by pressing another button on the toolbar. Press the third button on the toolbar to print. If you want to delete the saved formulas, press the fourth button on the toolbar. Converting a formula When the formula is ready, you can publish parts of the formula. To publish part of a formula, select the item with the cursor. Press the fifth button on the toolbar to publish the formula. You can also print the converted formula by clicking the "Print" button. Zoom a formula If you want to increase or decrease the formula, press the third button on the back of the toolbar.

Screenshots

iPeriodic for iPhone4 screens
Formula Conversion3 screens

Verdict

The call

The clearest difference is update cadence: iPeriodic for iPhone at every 8 days against Formula Conversion's every 26 months. iPeriodic for iPhone also leads on iOS requirement (6.1 vs 14.1). On price, ads, in-app purchases 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 and Formula Conversion sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

iPeriodic for iPhone ships an update every 8 days, Formula Conversion every 26 months. The most recent releases landed on September 26, 2026 and September 10, 2026 respectively.

Scorecard2 real differences · 4 level
iPeriodic for iPhone versus Formula Conversion: the parameters behind the verdict, then further details
ParameteriPeriodic for iPhoneFormula Conversion
PriceFreeFree
Update frequencyEvery 8 days — betterEvery 26 months
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS6.1 — better14.1
Further details — not scored
Size16 MB2 MB
Age rating4+4+
DeveloperThitipong WongsathoJanek Soomets

In-app purchases

1 purchases

iPeriodic for iPhone

One-time1
  • Remove Ads ($0.99)$0.99
1 purchases

Formula Conversion

One-time1
  • Upgrade Formula Conversion$3.99

Questions

Is iPeriodic for iPhone free?
iPeriodic for iPhone is free to download, with in-app purchases available.
Is Formula Conversion free?
Formula Conversion is free to download, with in-app purchases available.
Do iPeriodic for iPhone or Formula Conversion have ads?
Neither iPeriodic for iPhone nor Formula Conversion shows ads.
Which is updated more often, iPeriodic for iPhone or Formula Conversion?
iPeriodic for iPhone ships an update every 8 days, and Formula Conversion every 26 months. Most recently, iPeriodic for iPhone was updated on September 26, 2026 and Formula Conversion on September 10, 2026.

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