Comparison

NFC Badge vs Diamond X2 Lite

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

Head to head
About

NFC Badge

Features
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-需搭配由NFCtoGO.com發行的NFC BADGE金卡及SEAL憑證貼標來使用。 -NFC BADGE金卡可簽發代表本人的創作、識別、簽證、擁有、收藏、特許、授權等的SEAL憑證。 -SEAL此憑證可以內嵌模組、封籤貼紙、保證卡等型式存在,並保存於其內的NFC TAG晶片中。 -以此App感應BADGE卡後,集可編修擁有者資料,並將本人的簽章加簽至新的SEAL貼標內,以作為憑證之用。

About

Diamond X2 Lite

Features
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This is a trial version of the "Diamond X2" app. "Diamond X2" makes it easy to find the date and time of Diamond Fuji. By setting your "Viewpoint" to the Tokyo Metropolitan Building North Observatory or Tokyo Metropolitan Building South Observatory, you can experience and check all of its features without any restrictions. Select "List" from the "Viewpoint" view, tap "Select from Facilities, etc. (Built-in Data)," and select either the Tokyo Metropolitan Building North Observatory or Tokyo Metropolitan Building South Observatory. We would appreciate it if you would purchase "Diamond X2" after trying out this app. You can use GPS and web maps to create diamonds from any location. Diamonds other than Mt. Fuji are also possible. The app includes built-in data for over 1,200 mountains across Japan, as well as the Tokyo Metropolitan Building Observatory, Tokyo Tower, Tokyo Skytree, and more. Like "Yamaotaku for Mac (Yamac)," it takes into account the curvature of the Earth and atmospheric refraction to produce highly accurate results. It supports both Japanese and English display, automatically switching based on your iPhone's language setting. Location data files can be shared with Mac and Windows. Differences from "Diamond X" 1. Diamond-eligible locations are now marked with a checkmark in the location selection list. This allows you to quickly find diamond-eligible locations. Calculation speed has been significantly improved, allowing for stress-free use of this feature. 2. Mount Fuji can now be displayed from any location, regardless of whether diamonds are available. 3. The sun's altitude and shape reflect atmospheric refraction. (At low altitudes, the display will be vertically compressed.) 4. Sunrise and sunset times for a specified period can be displayed in a list. 5. Improved support for calculation errors. 6. Improved calculation accuracy. 7. Multi-core support significantly improves calculation performance. 8. Added the ability to transfer calculation results to other apps. 9. The UTC offset corresponding to the viewpoint's time zone can now be set automatically or manually, allowing support for time zones other than Japan. 10. Help is now available for some functions. (Tap the ? icon to display it) 11. Instructions for sharing files with your PC, such as myData, are now displayed. 12. More languages ​​are now supported. 13. An on/off switch for transparency has been added. 14. Diamond misalignment display can now be selected between "m" and "degrees." 15. A new switch has been added to reset settings.

Screenshots

NFC Badge4 screens
Diamond X2 Lite4 screens

Verdict

The call

The clearest difference is iOS requirement: NFC Badge at 12.4 against Diamond X2 Lite's 14.0. 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

NFC Badge ships an update every 3 weeks, Diamond X2 Lite every 2 weeks. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.

Scorecard1 real difference · 5 level
NFC Badge versus Diamond X2 Lite: the parameters behind the verdict, then further details
ParameterNFC BadgeDiamond X2 Lite
PriceFreeFree
Update frequencyEvery 3 weeksEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS12.4 — better14.0
Further details — not scored
Size54 MB15 MB
Age rating17+4+
DeveloperRevtel Tech co.ltdICHIROU YONEYAMA

In-app purchases

None

NFC Badge

No in-app purchases

None

Diamond X2 Lite

No in-app purchases

Questions

Is NFC Badge free?
NFC Badge is free to download, with no in-app purchases.
Is Diamond X2 Lite free?
Diamond X2 Lite is free to download, with no in-app purchases.
Do NFC Badge or Diamond X2 Lite have ads?
Neither NFC Badge nor Diamond X2 Lite shows ads.
Which is updated more often, NFC Badge or Diamond X2 Lite?
NFC Badge ships an update every 3 weeks, and Diamond X2 Lite every 2 weeks. Most recently, NFC Badge was updated on October 27, 2026 and Diamond X2 Lite on October 28, 2026.

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