The one-paragraph answer
A forex trading app is mobile software that connects you to a broker’s execution infrastructure and lets you open, manage, and close currency trades from a phone or tablet. It is not the broker — it is the interface. The same trade you make in the app could also be made on the broker’s desktop platform or web terminal. The app is a front-end; the broker’s servers, liquidity connections, and regulatory licence are the back-end.
Three types of “forex app” (they are not all the same thing)
Type 1: Broker’s own app
Brokers like eToro, Plus500, and AvaTrade build their own mobile applications. The app is exclusive to that broker — you cannot connect a different broker’s account to it. These tend to have the best onboarding UX (optimised for new users), but the platform features (charting, order types, API access) are usually thinner than professional terminals.
Type 2: Third-party terminal connected to a broker
MetaTrader 4 (MT4) and MetaTrader 5 (MT5) are applications built by MetaQuotes that connect to hundreds of different brokers. cTrader is built by Spotware and connects to brokers who license it. TradingView is a charting platform that integrates with a small number of brokers for order execution.
These are platform-agnostic — if your broker is replaced, you can take the same MT4 or MT5 app and connect it to a different broker. Your chart layouts, indicators, and (in some cases) EAs transfer with you.
Type 3: Social/copy-trading hybrid
eToro is the dominant example of a platform where the “app” experience is primarily social — a feed of what other traders are doing, copyable position data, and community commentary. The charting and order-entry are functional but secondary to the social layer.
App vs desktop: what you actually lose on mobile
| Feature | Desktop terminal | Mobile app |
|---|---|---|
| Running Expert Advisors (EAs) | Yes — EAs run locally or on VPS | No — EAs require a running desktop process |
| Multi-chart analysis | 6–12 charts simultaneously | Typically 1–2 at a time |
| Full indicator suite | 30–50 built-in + custom | Typically 20–30 built-in, fewer custom |
| Keyboard shortcuts | Yes — efficient order modification | No |
| Order complexity | All types (OCO, trailing, iceberg) | Most platforms: market, limit, stop only |
| Screen real estate | Large monitor = more context at once | Limited; requires more scrolling |
What you do not lose on mobile
- Live execution: orders placed on mobile fill at the same prices as desktop orders on the same broker infrastructure
- Account management: margin monitoring, balance, P&L, open positions — all identical to desktop
- Alert notifications: price alerts and margin call notifications are typically more reliable on mobile (push notifications vs desktop alerts that require the terminal to be open)
- Demo accounts: full demo functionality is available on all major mobile apps
The practical question: which app should you download first?
If you have never traded forex before: eToro or Plus500 for the lowest friction onboarding, or OANDA if you want to start with a more serious platform and plan to trade manually.
If you have traded before and want to connect to a broker via MT4 or MT5: download MetaTrader 5 (not MT4 — MT5 is the current version) from your broker’s official page or the App Store. See our guide: How to install MT5 on Android safely.
The first three questions to ask before you deposit
- Is this broker regulated in my country? Check the FCA register (UK), CFTC/NFA (US), ASIC (AU), or CySEC (EU). A broker advertising 500:1 leverage to UK residents is not legally operating under FCA rules and cannot offer you the protection of a Tier-1 regulator.
- What is the actual cost of trading? Find the EUR/USD spread and commission. “Zero commission” means the cost is in the spread. Calculate the all-in cost per lot.
- Can I open a demo account without depositing money? Every legitimate broker offers a demo. If a broker pressures you to deposit before you can try the platform, leave.
See also: How forex apps make money · What is a spread? · Best forex apps for beginners