Comparison

RuinRisk vs FX_最適ロット計算機~許容損失額を一定にするアプリ

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

Head to head
About

RuinRisk

Visualize your investment and trading risk with this intuitive calculator. Easily adjust parameters like risk per trade and win rate to understand your probability of ruin. Offers both basic and advanced analysis modes for beginners and experienced traders.

Highlights
  • Probability of Ruin Simulation
  • Heatmap Risk Visualization
  • Monte Carlo Simulations (Pro Mode)
  • Maximum Drawdown Estimation (Pro Mode)
  • Drawdown Probability Analysis (Pro Mode)
  • Strategy Comparison
Features
Read full description

RuinRisk shows how likely a trading plan is to wipe out your capital, and how deep the drawdowns along the way can get. Enter three numbers and the result updates as you move the sliders. THREE INPUTS • Win rate • Risk:reward ratio • Capital risk (the share of your capital you risk on each trade) Set each one with a slider or type the value directly. All three move in steps of 0.1 and are remembered the next time you open the app. FREE: LEGACY MODE • CALC: Risk of ruin, defined as the probability of losing all of your capital, calculated instantly from your three inputs. • HEATMAP: A color-coded risk-of-ruin table. Choose which parameter to hold fixed, pinch to zoom, and double-tap to return to the default zoom. • A short walkthrough appears on first launch and can be reopened anytime from the button at the top right. PREMIUM: PRO MODE Pro mode is unlocked with a one-time in-app purchase. It is not a subscription. • CALC: Ruin is defined as your capital falling to a level you choose (50% by default; 30% and 20% are also available). The theoretical value is shown next to a log-growth estimate, along with the difference between the two. • HEATMAP: Marks your current settings on the map, compares which of the three inputs drives your risk the most, and shows how far the risk of ruin would fall if you changed one input on its own. • ANALYSIS: Monte Carlo simulation of maximum drawdown over 100, 500 or 1,000 trades, with the probability of a 10%, 20%, 30%, 50% or 70% drop from the peak. Results are summarized from three perspectives: ruin probability, Monte Carlo drawdown, and position sizing against the Kelly criterion. • MATRIX: A table of drawdown probabilities from 5% to 100% across 100, 500 and 1,000 trades. Save up to five plans, compare them side by side, apply a saved plan to your inputs, and export the table as a CSV file. • Settings: Ruin definition, compounding on or off, simulation quality (1,000, 10,000 or 100,000 runs), and the percentile used for maximum drawdown (50th, 75th or 95th). Legacy and Pro define ruin differently, so the same inputs give different numbers in each mode. The app explains the difference on screen. WHO IT'S FOR • Traders who want to check a position size before putting real money at risk • Anyone comparing approaches with different win rates and risk:reward ratios • People learning money management who want to see how the numbers move GOOD TO KNOW • No ads, no account and no tracking. Your inputs and saved plans stay on your device. • Supports VoiceOver and larger text sizes. • For iPhone and iPad. Requires iOS 18 or later. • Available in English and Japanese. RuinRisk is a calculation tool for education and reference. Its results are theoretical values and simulations based on the numbers you enter. They are not investment advice, and they do not predict or guarantee future results. Trading involves the risk of loss.

About

FX_最適ロット計算機~許容損失額を一定にするアプリ

Calculate optimal trade lot sizes based on your acceptable loss amount. This app helps manage risk for Forex and CFD trading, making it suitable for beginners. It supports various currencies, indices, and CFD sizes for precise position adjustments.

Highlights
  • Calculate lot size from acceptable loss
  • Supports Forex, Gold, Nikkei 225, and Dow Jones
  • Handles various currency and CFD sizes
  • Rounds lot numbers to the second decimal place
  • Real-time position size calculation
  • Supports stop-loss price for lot calculation
Features
Read full description

損切り金額からロットを算出! FXで資金管理をするためのロット計算機アプリです。 許容損失額から最適なロットを計算できるため、初心者にもおすすめです。 ポジションサイズの調整によるリスクコントロールにお役立てください。 【特徴】 ・為替だけでなく、GOLD、日経225、NYダウに対応 ・為替は1,000通貨、10,000通貨、100,000通貨に対応 ・CFDは1,100サイズに対応 ・ロット数は小数点第二位以下を四捨五入 【対応している通貨/CFD】 USDJPY EURJPY GBPJPY AUDJPY CADJPY CHFJPY EURUSD GBPUSD AUDUSD CADUSD USDCHF XAUUSD JP225Cash US30Cash 【こんな方におすすめ】 ・デモトレードのシュミレーションのロット計算がしたい ・チャートを見ながら瞬時にポジションサイズを計算したい ・国内だけじゃなく、海外の取引業者にも使いたい ・指値や逆指値で、損切価格から適正なロット数を計算したい ※インターネットへの接続が必要です ■免責事項 外国為替取引では、投資資本に対して重大なリスクが伴います。本アプリに含まれる情報やデータは、提供のみを目的としています。これらの情報やデータは、アドバイスまたは推奨とはならず、またアドバイス等として解釈しないでください。このアプリによるいかなる損失も責任は負いません。 ------- 期間終了後、購入は iTunes アカウントに適用されます。 現在の期間が終了する 24 時間以内にキャンセルしない限り、サブスクリプションは自動的に更新されます。 iTunes アカウントの設定でいつでもキャンセルできます。 サブスクリプションを購入すると、無料トライアルの未使用部分は失われます。 詳細については、https://tombstone.space/termsofuse および https://tombstone.space/privacypolicy を参照してください。

Screenshots

RuinRisk4 screens
FX_最適ロット計算機~許容損失額を一定にするアプリ3 screens

Verdict

The call

The clearest difference is review sentiment: RuinRisk at 80% against FX_最適ロット計算機~許容損失額を一定にするアプリ's 40%. RuinRisk also leads on ads (none vs shown). FX_最適ロット計算機~許容損失額を一定にするアプリ's advantage is monetization model (free with in-app purchases vs paid) and iOS requirement (13.0 vs 18.0). On price, update cadence, 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. RuinRisk sells 1 one-off in-app purchase and FX_最適ロット計算機~許容損失額を一定にするアプリ sells 1 in-app purchase, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 16, 2026 and October 10, 2026 respectively.

Scorecard4 real differences · 6 level
RuinRisk versus FX_最適ロット計算機~許容損失額を一定にするアプリ: the parameters behind the verdict, then further details
ParameterRuinRiskFX_最適ロット計算機~許容損失額を一定にするアプリ
PriceFreeFree
Rating4.0 (1 ratings) — better—
Positive reviews80.0% of reviews — better40.0% of reviews
Number of ratings1 — better—
Update frequencyEvery 3 monthsEvery 3 months
AdsNo — betterYes
In-app purchasesYesYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.013.0 — better
Further details — not scored
Size2 MB39 MB
Age rating4+4+
DeveloperRYUICHIROU SHIMONOKoji Watanabe

Customer experience

RuinRisk

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive80.0%
Neutral0.0%
Negative20.0%

FX_最適ロット計算機~許容損失額を一定にするアプリ

Written reviews5 reviews
Positive40.0%
Neutral20.0%
Negative40.0%

In-app purchases

1 purchases

RuinRisk

One-time1
  • RuinRisk Premium$2.99
1 purchases

FX_最適ロット計算機~許容損失額を一定にするアプリ

Subscriptions1
  • プレミアム機能$2.991 Month

Questions

Is RuinRisk free?
RuinRisk is free to download, with in-app purchases available.
Is FX_最適ロット計算機~許容損失額を一定にするアプリ free?
FX_最適ロット計算機~許容損失額を一定にするアプリ is free to download, with in-app purchases available.
Do RuinRisk or FX_最適ロット計算機~許容損失額を一定にするアプリ have ads?
FX_最適ロット計算機~許容損失額を一定にするアプリ shows ads; RuinRisk does not.
Which is updated more often, RuinRisk or FX_最適ロット計算機~許容損失額を一定にするアプリ?
RuinRisk ships an update every 3 months, and FX_最適ロット計算機~許容損失額を一定にするアプリ every 3 months. Most recently, RuinRisk was updated on October 16, 2026 and FX_最適ロット計算機~許容損失額を一定にするアプリ on October 10, 2026.

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