Comparison

FX LotSize vs FX Lot Size Calculator

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

Head to head
About

FX LotSize

Features
Read full description

How to use the app Lot calculation tool You can calculate the appropriate lot when entering FX (holding a position). 1. Set the currency pair 2. Enter the margin (account balance) 3. Set the loss tolerance as a percentage of the margin 4. Finally, enter the stop loss 5. Tap the calculate button to display the appropriate lot. Profit and loss ratio tool 1. Set the profit lock pips (take profit) 2. Set the loss tolerance pips (stop loss) 3. Automatically display risk reward Settings Regarding the currency of 1 lot, please check the information of your trading company and set it. The default is set to 10,000 currency per lot. The loss tolerance (%) can be changed to the % set when the app is launched. The currency pair at launch can be changed to the currency pair set when the app is launched. The currency pair list can be listed as you like. The only currency pairs available in the free version are USD/JPY and EUR/USD/GBP/JPY. If you want to calculate lots for other currency pairs, you will need to upgrade. After upgrading, you will be able to use all currency pairs without any charge.

About

FX Lot Size Calculator

Calculate forex and gold position sizes quickly and accurately on your mobile device. This tool helps traders size their trades correctly in seconds, offering broker and leverage independence with real-time market data.

Highlights
  • Quick pair selection
  • Broker independent
  • Leverage independent
  • Real-time market data
  • Account data saved
Features
Read full description

Stop fumbling with web calculators while trading. FleX puts accurate Lot Size Calculations right on your phone. Size your Forex & Gold Positions correctly in seconds. # Features • Quick Pair Selection • Broker Independent • Leverage Independent • Real-Time Market Data • Account Data saved for reuse # Pricing FleX is premium and ad-free. A subscription is required to use the app. We offer a 7-day free trial so you can test all features. • Annual Plan - $9.99 / year • Weekly Plan - $2.99 / week • Lifetime Plan - $24.99 once Prices shown are for US customers and may vary by region. Payment charged to Apple Account at confirmation of purchase. Subscription automatically renews unless canceled at least 24 hours before the end of the current period. Manage Subscriptions in App Settings. # Legal Terms of Use: https://lotsize.app/terms-of-use.pdf Privacy Policy: https://lotsize.app/privacy-policy.pdf

Screenshots

FX LotSize4 screens
FX Lot Size Calculator4 screens

Verdict

The call

The clearest difference is update cadence: FX LotSize at every 3 days against FX Lot Size Calculator's every 3 weeks. FX LotSize also leads on iOS requirement (18.0 vs 26.0). 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. FX LotSize sells 1 one-off in-app purchase and FX Lot Size Calculator sells 3 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

FX LotSize ships an update every 3 days, FX Lot Size Calculator every 3 weeks. The most recent releases landed on October 22, 2026 and October 6, 2026 respectively.

Scorecard2 real differences · 7 level
FX LotSize versus FX Lot Size Calculator: the parameters behind the verdict, then further details
ParameterFX LotSizeFX Lot Size Calculator
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 3 days — betterEvery 3 weeks
AdsNoNo
In-app purchasesYesYes
Monetization—Subscription
DevicesiPhoneiPhone
Requires iOS18.0 — better26.0
Further details — not scored
Size8 MB14 MB
Age rating4+4+
Developeryuki kawahitoChristoph Stadelbauer

In-app purchases

1 purchases

FX LotSize

One-time1
  • All Currency Pair$5.99
3 purchases

FX Lot Size Calculator

Subscriptions2
  • FleX Premium$2.997 Days
  • FleX Premium7 Days trial$9.991 Year
One-time1
  • FleX Premium Lifetime$24.99

Questions

Is FX LotSize free?
FX LotSize is free to download, with in-app purchases available.
Is FX Lot Size Calculator free?
FX Lot Size Calculator is free to download, with in-app purchases available.
Do FX LotSize or FX Lot Size Calculator have ads?
Neither FX LotSize nor FX Lot Size Calculator shows ads.
Which is updated more often, FX LotSize or FX Lot Size Calculator?
FX LotSize ships an update every 3 days, and FX Lot Size Calculator every 3 weeks. Most recently, FX LotSize was updated on October 22, 2026 and FX Lot Size Calculator on October 6, 2026.

Other comparisons