Comparison

D vs Saisun

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

Head to head
About

D

This app helps users track their Daimoku chanting sessions using a stopwatch, manage personal prayers, and set and monitor progress towards chanting goals. It offers trend analysis, reminders, and a calendar for anniversaries, all while functioning offline.

Highlights
  • Offline Daimoku recording
  • Prayer management (add, edit, delete)
  • Target setting and progress tracking
  • Daimoku trend analysis
  • Customizable reminders
  • Anniversary calendar
Read full description

-Function List- 1: Record Daimoku This is a basic function of this app, so I created this to record properly in offline. This app records your Daimoku by Stopwatch, but it is enable to count whenever you open other apps or when your device went sleep until you force termination. When it counting, icon badge will show up on Chant tab. We can use our devices and apps but not always. No worry, you can record it later. 2: Prayers Management You can freely add, edit, and delete your own prayers, and see them always even while chanting. Every prayers has useful attributes such as start date, target end date, category, favorite flag, you can filter by category, and you can change those attributes with your swipe action. When I had managed my prayers by paper book, wrote black line and completed date when completed. You can do it the same thing with this app, and you can see completed and canceled prayers as well as On-Going prayers. I tried not to lose the usefulness of the way of paper. Each prayers can be managed by the status of "On-Going", "Completed", and "Canceled" 3: Target Management When you see, touch, meet, or attend in a meeting, you will resolve things such as 1 hour Daimoku everyday. Or maybe you will start your challenge towards next coming anniversary day. You can use this "Target Management" function to manage your challenge. By checking the actual result of your Daimoku from start date and end date on the beautiful graph, you can know your progress and position against to your target. Of course we will have multiple targets, and this app can manage multiple targets. After complete one target, you can add next one and check the progress. Also you can check back your past results and past targets, because this app manage targets by adding to a target list. 4: Trend Analysis In addition to Target Management, you can check your Daimoku records of last 1 week by daily, last 1 month by daily, and 1 year by monthly. And, you can also check average by weekday, so you will see that "Average of Friday is little behind compared with other weekday" Also, D-Rec has a calendar function, and some anniversaries are set as default. I know that we have our own anniversaries by region and organization. No worry, you can add your own anniversaries on the calendar and target it. By setting some your own anniversaries, you can set the target. 5: Dimoku Amount Calculation This app basically manage your Daimoku by second unit, however, you can also check Daimoku amount at the same time, if you register your Daimoku amount per minute in advance. Is if really 1,000 Daimoku by 20 minutes? Pace is different by individuals, so register your pace. 6: Remind Function I think you used to chant Daimoku everyday and already that's a part of your life. But if you set the remind time, app will tell you "It is the time to chant Daimoku." 7: Calendar Function (Anniversary Register Function) You can check your chanting date and time by calendar. Some anniversaries which are on public home page of SIG, are default set. In addition, you may have your own anniversaries for your local region, and organizations. Yes, you can add any anniversaries on this calendar. It is good to set some anniversaries and set target toward some your anniversaries. 8: language is available in Japanese and English I would like overseas SGI members to use this app, so I created this in both Japanese and English. If you change your iOS device language, the app language change.

About

Saisun

Features
Read full description

AI-assisted measurements for clothes and everyday objects Lay clothes flat and take a photo. AI identifies garment measurement points to help you check sizes. With the new Width & Height mode, you can also measure flat-laid paper, small items, and even fish you have caught. From resale listings and online shopping to wardrobe organization and everyday size checks, Saisun makes measuring more convenient. [Key Features] ・AI detects garment measurement points to assist with sizing ・Measure the width and height of flat-laid objects with the new mode ・Measure several objects at once when the app detects them separately ・Scale-based measurements using a reference marker ・Support for shoulder width, chest width, garment length, sleeve length, waist, inseam, and more ・Manually adjust measurement points and reference points ・Copy results, share annotated images, and save measurement history [Four Measurement Modes] ・Tops: Measure shoulders, chest, length, sleeves, and more ・Pants: Measure the waist, inseam, and other trouser dimensions ・Width & Height: Measure flat-laid paper, small items, fish, and more; supports multiple detected objects ・Manual: Set measurement points yourself Pants mode requires a paid plan. [Ways to Use Saisun] ・Add measurements to resale and auction listings ・Check sizes before shopping online ・Keep a record of clothing dimensions ・Check paper, envelopes, and card sizes ・Measure small household items and accessories ・Check the approximate size of a fish you have caught from a photo ・Measure multiple items in one photo when detected Measuring clothes and everyday objects, made easier. Make size checks simpler with Saisun. ※For more reliable measurements, use the QR reference marker provided in the app (scale comparison method). ※If the QR marker is not detected, the app can still show indicative measurements based on provisional reference points. These are not verified physical dimensions. ※Results may vary with lighting, camera angle, object placement, marker position, and image distortion. Use a measuring tape when precise dimensions are needed. [Terms of Use] https://shopkoyomi.com/app/saisun/terms-en.html [Privacy Policy] https://shopkoyomi.com/app/saisun/privacy-policy-en.html

Screenshots

D1 screens
Saisun4 screens

Verdict

The call

The clearest difference is in-app purchases: D at none against Saisun's 1. D also leads on update cadence (every 5 days vs monthly) and iOS requirement (11.2 vs 18.0). On price, ads 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. Saisun sells 1 in-app purchase, starting at $2.99 per month. D asks for nothing beyond the download.

UpkeepUpdate frequency

D ships an update every 5 days, Saisun monthly. The most recent releases landed on October 24, 2026 and October 17, 2026 respectively.

Scorecard3 real differences · 5 level
D versus Saisun: the parameters behind the verdict, then further details
ParameterDSaisun
PriceFreeFree
Positive reviews35.0% of reviews—
Update frequencyEvery 5 days — betterMonthly
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS11.2 — better18.0
Further details — not scored
Size16 MB52 MB
Age rating4+4+
DeveloperHiromi FujitaSatoshi Sakuma

In-app purchases

None

D

No in-app purchases

1 purchases

Saisun

Subscriptions1
  • Premium Plan$2.991 Month

Questions

Is D free?
D is free to download, with no in-app purchases.
Is Saisun free?
Saisun is free to download, with in-app purchases available.
Do D or Saisun have ads?
Neither D nor Saisun shows ads.
Which is updated more often, D or Saisun?
D ships an update every 5 days, and Saisun monthly. Most recently, D was updated on October 24, 2026 and Saisun on October 17, 2026.

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