Comparison

USIM스마트인증 vs Stock Principle

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

Head to head
About

USIM스마트인증

Securely store your digital certificates on your smartphone, eliminating worries about hacking or leaks. Access your certificates easily for logins and financial transactions anytime, anywhere.

Highlights
  • Secure certificate storage on smartphone
  • Protection against hacking and leaks
  • Convenient access for logins and transactions
  • Portable digital certificate management
  • Use for year-end tax settlement
Features
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[인증서 해킹, 유출 걱정 없는 스마트인증] 인증서를 저장할 때, 불안한 USB메모리나 PC에 저장하셨나요? 인증서 해킹, 유출 걱정 없는 스마트인증으로 인증서 보안과 휴대성을 모두 챙기세요! 연말정산 때도 편리하게 사용하세요~ 스마트인증은 스마트폰에 공동인증서를 저장하여 인증서 로그인, 금융 거래 등 본인인증이 필요할 때 사용하는 보안서비스 입니다. “스마트인증”과 “보안토큰”으로 인증서가 필요한 모든 사이트에서 이용가능합니다. [개발사정보] * 회사명 : 라온시큐어(주) * 주 소 : 서울특별시 영등포구 여의대로 108, 파크원타워2 47-48층(여의도동) * 서비스 이용문의 : (휴대폰) 114 / (유선) 1644-5128 (이메일) voc@raon.com

About

Stock Principle

Features
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Do you still remember why you bought that stock? Stock Principle is an AI trading journal, stock diary, and trading mistake tracker designed to help you log buy and sell reasons, master trading psychology, and build disciplined trading rules. The day you chased a breakout and bought the top out of FOMO. The day you ignored your stop-loss and held a losing position too long. The day one impulsive revenge trade wiped out weeks of steady gains. If you do not write down your thoughts in a trade journal, the same trading mistakes return in a different ticker. ■ A 3-Step Trading Journal Habit 1. Before you buy: Check your pre-trade checklist to verify your entry setup and trading rules. 2. After each trade: Log price, shares, and your emotional state in your buy and sell trade log. 3. After market close: Write a daily trading diary reflection and run an AI trade review. ■ From Entry to Exit, a Stock Diary for Your Reasons • Organize buy, hold, and sell records stock by stock in one clean trade journal. • Track US and global stocks in USD, KRW, or JPY with average cost and position size calculation. • Set target profit and stop-loss percentages to see your target and stop-loss prices immediately. • Record your entry mindset, checklist answers, and chart screenshots. • While holding, log emotions like conviction, anxiety, impatience, fear, or greed with your plan. • Review exit reasons and rule compliance to improve day trading and swing trading discipline. ■ AI Trade Review & 0–100 Discipline Scorecard • AI quotes the sentences from your trading journal to evaluate your rules, compliance, and reflections. • Get a 0–100 score across four pillars: Stop-Loss Discipline, Position Sizing, Entry Patience, and Emotion Control. • Discover your trading persona and the emotional triggers behind your losing trades. • Save IF-THEN rule cards directly into your trading checklist for the next session. ■ Trading Psychology & Behavioral Finance • Understand how cognitive biases, loss aversion, confirmation bias, and herd behavior affect your trades. • Connect behavioral finance concepts like FOMO and revenge trading to your own trade log. • Bookmark articles and attach personal trading notes. ■ Principles & Investing Quotes from Market Masters • Read trading rules and investing quotes from Warren Buffett, Peter Lynch, Jesse Livermore, and Ray Dalio with historical context. • Save favorite quotes to your home screen and import master templates into your checklist. ■ Daily Trading Diary & Macro Dashboard • Keep a daily stock diary with a one-line recap, what went well, what to fix, and home screen streak widgets. • Monitor the Fear & Greed Index, VIX, US Dollar Index, 10Y–2Y yield spread, oil, and gold on one macro dashboard. ■ Built for Traders and Investors Who • Gave up on clunky spreadsheet or paper trading journals after three days • Set stop-loss rules before market open but struggle to follow them live • Want a mistake tracker for day trading, swing trading, or stock investing • Want to apply trading psychology and master investor principles to daily habits ■ FAQ Q. Is it free to use? A. Yes. The trade journal, daily stock diary, trading rules, checklists, behavioral finance articles, and master quotes are free. AI trade reports and AI rule generation use in-app credits, earned via sign-up bonus, daily check-ins, and rewarded ads. Q. Do I need to link my brokerage account? A. No. Stock Principle requires no brokerage login or account connection. You log trades manually and privately. Q. Does it provide stock picks or signals? A. No. This app does not recommend stocks, execute orders, or guarantee returns. It is a private trading journal for recording and reviewing your own decisions. Turn today's regret into a rule for your next trade. Start your trading journal with Stock Principle today. Support: https://stockprinciple.web.app/support Privacy Policy: https://stockprinciple.web.app/privacy.html

Screenshots

USIM스마트인증4 screens
Stock Principle4 screens

Verdict

The call

The clearest difference is update cadence: Stock Principle at every 4 days against USIM스마트인증's every 4 months. 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

USIM스마트인증 ships an update every 4 months, Stock Principle every 4 days. The most recent releases landed on October 29, 2026 and October 28, 2026 respectively.

Scorecard1 real difference · 9 level
USIM스마트인증 versus Stock Principle: the parameters behind the verdict, then further details
ParameterUSIM스마트인증Stock Principle
PriceFreeFree
Rating1.8 (4 ratings) — better—
Positive reviews82.6% of reviews—
Number of ratings4 — better—
Update frequencyEvery 4 monthsEvery 4 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhoneiPhone, iPod — better
Requires iOS16.015.0 — better
Further details — not scored
Size50 MB49 MB
Age rating4+17+
DeveloperRaonSecure Co., Ltd.HyunJun Moon

In-app purchases

None

USIM스마트인증

No in-app purchases

None

Stock Principle

No in-app purchases

Questions

Is USIM스마트인증 free?
USIM스마트인증 is free to download, with no in-app purchases.
Is Stock Principle free?
Stock Principle is free to download, with no in-app purchases.
Do USIM스마트인증 or Stock Principle have ads?
Neither USIM스마트인증 nor Stock Principle shows ads.
Which is updated more often, USIM스마트인증 or Stock Principle?
USIM스마트인증 ships an update every 4 months, and Stock Principle every 4 days. Most recently, USIM스마트인증 was updated on October 29, 2026 and Stock Principle on October 28, 2026.

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