Comparison

Saisun vs SizeGo

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

Head to head
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

About

SizeGo

Easily compare and convert clothing sizes across different brands and countries. Find accurate size charts for men, women, and children, with options to browse by category or specific brands. Avoid shopping mistakes with this user-friendly utility.

Highlights
  • International size conversion
  • Brand-specific size charts
  • Category-based browsing
  • Side-by-side comparison
  • User-friendly interface
  • Frequent data updates
  • No account required
Features
Read full description

Compare tops, bottoms, outerwear, underwear, bras, hats, shoes, and rings for women, men, kids, and baby. Countries include Korea, the United States, the United Kingdom, Europe, Japan, China, France, Italy, and Australia. Save the size you wear for yourself or for someone in your family, tagged with the country that size came from. SizeGo shows that size alongside the matching size in another country. Save conversions you want to reuse. Open a brand’s own size guide when you want the brand’s page. No account is required. Your sizes and saved conversions stay on this phone. Size charts are a guide for shopping, not a guarantee of fit.

Screenshots

Saisun4 screens
SizeGo4 screens

Verdict

The call

The clearest difference is in-app purchases: SizeGo at none against Saisun's 1. SizeGo also leads on iOS requirement (15.1 vs 18.0). Saisun's advantage is ads (none vs shown) and update cadence (monthly vs every 2 months). 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. Saisun sells 1 in-app purchase, starting at $2.99 per month. SizeGo asks for nothing beyond the download.

UpkeepUpdate frequency

Saisun ships an update monthly, SizeGo every 2 months. The most recent releases landed on November 8, 2026 and November 5, 2026 respectively.

Scorecard4 real differences · 5 level
Saisun versus SizeGo: the parameters behind the verdict, then further details
ParameterSaisunSizeGo
PriceFreeFree
Rating—5.0 (2 ratings) — better
Number of ratings—2 — better
Update frequencyMonthly — betterEvery 2 months
AdsNo — betterYes
In-app purchasesYesNo — better
Monetization—Ad-supported
DevicesiPhone, iPadiPhone, iPod
Requires iOS18.015.1 — better
Further details — not scored
Size52 MB33 MB
Age rating4+4+
DeveloperSatoshi SakumaLUCKPLE LLC

In-app purchases

1 purchases

Saisun

Subscriptions1
  • Premium Plan$2.991 Month
None

SizeGo

No in-app purchases

Questions

Is Saisun free?
Saisun is free to download, with in-app purchases available.
Is SizeGo free?
SizeGo is free to download, with no in-app purchases.
Do Saisun or SizeGo have ads?
SizeGo shows ads; Saisun does not.
Which is updated more often, Saisun or SizeGo?
Saisun ships an update monthly, and SizeGo every 2 months. Most recently, Saisun was updated on November 8, 2026 and SizeGo on November 5, 2026.

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