Comparison

FitterAI vs 321GO

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

Head to head
About

FitterAI

Features
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FitterAI is a simple and powerful workout tracker designed for CrossFit athletes and fitness enthusiasts. Log your daily WODs, track personal records, and manage your 1RM progress in one place. FitterAI helps you stay organized and focused on your training goals. Key Features: โ€ข Log and track CrossFit WOD results โ€ข Record 1RM for major lifts โ€ข View workout history and progress โ€ข Create shareable workout result cards โ€ข Clean and easy-to-use interface Whether you are a beginner or an experienced athlete, FitterAI helps you keep track of your training and improve step by step. Start tracking smarter with FitterAI today.

About

321GO

Features
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CrossFit ยท ๊ธฐ๋Šฅ์„ฑ ํ›ˆ๋ จ ยท WOD ์šด๋™ ๊ธฐ๋ก์˜ ์‹œ์ž‘, WOD ์•Œ๋ฆผ๋ถ€ํ„ฐ ํ™œ๋™ ๊ธฐ๋ก, ์ปค๋ฎค๋‹ˆํ‹ฐ ํ”ผ๋“œ๊นŒ์ง€. WOD (์˜ค๋Š˜์˜ ์šด๋™) - ๋ฐ•์Šค WOD ์ž๋™ ์—…๋ฐ์ดํŠธ (์ง€์ ๋ณ„ ํ™•์ธ) - ๋‚ ์งœ๋ณ„ WOD ์กฐํšŒ ๋ฐ ์Šค์™€์ดํ”„ ํƒ์ƒ‰ - WOD ๋ถ๋งˆํฌ ์ €์žฅ - ์ปค๋ฎค๋‹ˆํ‹ฐ ์ฒด๊ฐ ๋‚œ์ด๋„ ํ‘œ์‹œ (WOD Lv) ์šด๋™ ๊ธฐ๋ก - ์ ์ˆ˜, ๋ ˆ๋ฒจ(Rx/A/B/C), ์ฒด๊ฐ ๋‚œ์ด๋„(1~10) ๊ธฐ๋ก - ๋ฉ”๋ชจ ๋ฐ ๊ณต๊ฐœ/๋น„๊ณต๊ฐœ ์„ค์ • - ์˜ค๋Š˜์˜ ํ™”์ดํŠธ๋ณด๋“œ ๊ธฐ๋ก ์ด๋ฏธ์ง€ ์ž๋™ ์ˆ˜์ง‘ ๊ฐœ์ธ ๊ธฐ๋ก(PR) ๊ด€๋ฆฌ - ๋ฐฑ์Šค์ฟผํŠธ, ๋ฐ๋“œ๋ฆฌํ”„ํŠธ, ๋ฒค์น˜ํ”„๋ ˆ์Šค, ํด๋ฆฐ์•ค์ €ํฌ, ์Šค๋‚ด์น˜ - PR ํžˆ์Šคํ† ๋ฆฌ ์ถ”์  AI Coach - ๋‚ด์ผ WOD + ๋‚˜์˜ ๊ธฐ๋ก + PR์„ ๋ถ„์„ํ•œ ๋งž์ถค ์ฝ”์นญ - ์šด๋™ ๊ธฐ๋ก 30๊ฐœ ์ด์ƒ ์‹œ ํ™œ์„ฑํ™” ์—ฐ์† ์šด๋™ ์ŠคํŠธ๋ฆญ - ์—ฐ์† ์ถœ์„์ผ์ˆ˜ ์ž๋™ ๊ณ„์‚ฐ (ํœด๊ด€์ผ ์ž๋™ ๊ฑด๋„ˆ๋›ฐ๊ธฐ) - ๋งˆ์ผ์Šคํ†ค ๋‹ฌ์„ฑ ์‹œ ์ถ•ํ•˜ ์• ๋‹ˆ๋ฉ”์ด์…˜ (3, 7, 10, 30, 100, 365์ผ) ์ปค๋ฎค๋‹ˆํ‹ฐ ํ”ผ๋“œ - ํšŒ์›๋“ค์˜ ์šด๋™ ๊ธฐ๋ก ํƒ€์ž„๋ผ์ธ - ์ข‹์•„์š” ๋ฐ ๋Œ“๊ธ€ ํƒ€์ด๋จธ & ์นด์šดํ„ฐ - AMRAP, For Time, EMOM, Tabata ํƒ€์ด๋จธ - ๋ ™ ์นด์šดํ„ฐ ๋ฑƒ์ง€ ์‹œ์Šคํ…œ - ๊พธ์ค€ํ•จ, ํผํฌ๋จผ์Šค, ์ปค๋ฎค๋‹ˆํ‹ฐ ์นดํ…Œ๊ณ ๋ฆฌ๋ณ„ ์—…์  ๋ฑƒ์ง€

Screenshots

FitterAI4 screens
321GO4 screens

Verdict

The call

The clearest difference is iOS requirement: FitterAI at 15.1 against 321GO's 18.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

FitterAI ships an update weekly, 321GO every 4 days. The most recent releases landed on October 25, 2026 and October 19, 2026 respectively.

Scorecard1 real difference ยท 5 level
FitterAI versus 321GO: the parameters behind the verdict, then further details
ParameterFitterAI321GO
PriceFreeFree
Update frequencyWeeklyEvery 4 days โ€” better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPodiPhone, iPad, Apple Watch โ€” better
Requires iOS15.1 โ€” better18.0
Further details โ€” not scored
Size29 MB18 MB
Age rating4+4+
DeveloperSUNGHWAN PARKDonghan Choi

In-app purchases

None

FitterAI

No in-app purchases

None

321GO

No in-app purchases

Questions

Is FitterAI free?
FitterAI is free to download, with no in-app purchases.
Is 321GO free?
321GO is free to download, with no in-app purchases.
Do FitterAI or 321GO have ads?
Neither FitterAI nor 321GO shows ads.
Which is updated more often, FitterAI or 321GO?
FitterAI ships an update weekly, and 321GO every 4 days. Most recently, FitterAI was updated on October 25, 2026 and 321GO on October 19, 2026.

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