Comparison

Forex Calculator vs koban

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

Head to head
About

Forex Calculator

Features
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Here is the problem. When USDJPY was at 110.065, you went long EURUSD at 1.12236 for 110,000 yen and cut your losses at 1.12071. Q. How much will you lose when the stop loss is taken? You can calculate this instantly, right? Yes, it is 19,977 yen. I can't calculate it. However, if you don't know how much you will lose and you just place a stop-loss order, it is risky. If you don't know how much you will lose, it is risky. However, I have created something that solves all of these problems. How much will you lose? How many lots should I enter to be safe? How much you can afford to lose ↑You can find out all of these things. It's called "Risk Calculator". However, this is a boring name, so I decided to call it "PipopaPips". The name is "PipopaPips". _____ Functions Function to calculate the safe lot It is calculated from the acceptable loss amount and the acceptable loss range. If you set the stop loss of the acceptable loss range in the calculated lot, you can trade without exceeding the acceptable loss amount. Function to calculate the amount of loss The amount of loss is calculated based on the desired lot and the allowable price range. You can trade without exceeding the calculated amount of loss by setting a stop loss of the allowable loss range for the desired lot. Function to calculate the allowable loss range (stop loss) This is calculated based on the desired lot and the allowable loss amount. (It can also be calculated as a percentage of funds instead of the amount of loss.) (You can also use % of funds instead of the amount of loss.) If you set the stop loss at the calculated allowable loss range and trade with the desired lot, you can trade without exceeding the allowable loss amount. _____ Recommended for the following people! People who trade using charts in forex investment. People who use TradingView or MT4/MT5 for trade analysis. People who use TradingView or MT4/MT5 for trade analysis. People who use the Trade Note function of Trading View. People who use the trade note function of the trading view. - People who are diligent and want to manage their assets properly. People who use demo trading to simulate trades. People who know that they can control risk in Forex. People with a high awareness of risk management who have been managing their assets with stock dividends Translated with www.DeepL.com/Translator (free version)

About

koban

Features
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Simple monthly balance management app ・seamless list display ・graph display ・multiple accounts ・color variations

Screenshots

Forex Calculator2 screens
koban4 screens

Verdict

The call

The clearest difference is price: koban at Free against Forex Calculator's $5.99. On update cadence, 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

koban is free to download; Forex Calculator costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Forex Calculator ships an update every 2 months, koban every 3 months. Both last shipped on November 3, 2026.

Scorecard1 real difference · 5 level
Forex Calculator versus koban: the parameters behind the verdict, then further details
ParameterForex Calculatorkoban
Price$5.99Free — better
Update frequencyEvery 2 months — betterEvery 3 months
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better12.0
Further details — not scored
Size25 MB37 MB
Age rating4+4+
DeveloperAdvan inc.Kaharu Fukushima

In-app purchases

None

Forex Calculator

No in-app purchases

None

koban

No in-app purchases

Questions

Is Forex Calculator free?
Forex Calculator costs $5.99, with no in-app purchases.
Is koban free?
koban is free to download, with no in-app purchases.
Do Forex Calculator or koban have ads?
Neither Forex Calculator nor koban shows ads.
Which is updated more often, Forex Calculator or koban?
Forex Calculator ships an update every 2 months, and koban every 3 months. Most recently, Forex Calculator was updated on November 3, 2026 and koban on November 3, 2026.

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