SIS BGTrader vs Option Calculation
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SIS BGTrader
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SIS BGTrader е мобилно приложение за търговия на Българска фондова борса. Приложението е напълно синхронизирано с инсталационната версия на платформата BG Trader и с нейната уеб базирана версия Web BG Trader. Управлявайте вашата сметка, следете търговията на акции, облигации, компенсаторни записи и други инструменти на Българска фондова борса и пласирайте поръчки навсякъде и по всяко време. Предимства на SIS BG Trader: - Моментален достъп до пода на БФБ и котировки в реално време - Богата функционалност - Пълна интеграция с инсталационната и уеб базираната версия на платформата BG Trader - Интуитивен интерфейс - Графичен модул - Автоматично въвеждане на поръчките SIS BG Trader предлага БЕЗПЛАТНА демо сметка с 10,000 лв. на инвеститори, които желаят да тестват приложението без риск. Можете да си регистрирате безплатно демо от логин екрана на SIS BG Trader, като натиснете бутона 'Регистрирай демо сега'.
Option Calculation
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This is an effective and practical app for calculation of European-style option! Based on BSM Model: • support to calculate option price, implied volatility, put-call parity. • When you calculate option price/implied volatility, the greeks are calculated and show simultaneously. • Support to show option price/delta/gamma for 2D/3D interactively! • Overlay contracts' curve with different days/implied volatility in same graph. For example, to calculate option price: input underlying price, strike price, days to expire, riskless rate, implied volatility, tap the blue button in the bottom, the option price will be calculated and show immediately! Then tap the button in the top right, show function line of delta/gamma and underlying price in theory. Slide to change the underling price, see how price/delta/gamma changes.
Screenshots
Verdict
The clearest difference is iOS requirement: SIS BGTrader at 13.0 against Option Calculation's 16. On price, update cadence, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 17, 2026 and October 25, 2026 respectively.
| Parameter | SIS BGTrader | Option Calculation |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 16 |
| Further details — not scored | ||
| Size | 4 MB | 5 MB |
| Age rating | 17+ | 4+ |
| Developer | BenchMark Finance AD | Jinfu Jiang |
In-app purchases
SIS BGTrader
No in-app purchases
Option Calculation
No in-app purchases
Questions
Is SIS BGTrader free?
Is Option Calculation free?
Do SIS BGTrader or Option Calculation have ads?
Which is updated more often, SIS BGTrader or Option Calculation?
Other comparisons
