Definition
What an exchange rate is
An exchange rate is the price of one currency in terms of another. If 1 USD trades for 83 INR, the USD/INR exchange rate is 83. Central banks, commercial banks, and online quote services publish reference rates that update continuously during trading hours.
For app developers, the exchange rate matters in exactly one place: when Apple or Google translate your base USD price into local currency to display on the store. That translation is pure FX, not purchasing power.
Spot rate vs reference rate vs Apple's rate
Not all FX numbers are the same.
- Spot rate. The live market rate at which currencies trade between banks. Updates every second.
- Reference rate. A daily fixed quote published by a central bank (the European Central Bank publishes one at 14:15 CET each business day). Used by businesses for accounting and contracts.
- Apple's storefront FX. Apple uses its own internal rates with periodic updates. Per Apple's pricing reference, when FX moves significantly, Apple may adjust storefront prices automatically.
- Google Play's FX. Google Play uses its own FX feed and allows you to enable auto-conversion per region, but you can also override prices manually.
None of these are exactly equal to the rate your bank quotes on a wire transfer.
Why exchange rate alone is wrong for app pricing
FX tells you what 19.99 USD converts to in INR. It does not tell you what an Indian subscriber can afford. The market exchange rate puts $19.99 at roughly ₹1,660. The PPP-adjusted equivalent is closer to ₹499. That gap is the FX-vs-PPP gap, and it is the entire reason apps relying on store auto-pricing under-convert in emerging markets.
How does the exchange rate change app prices over time?
FX moves daily. If the rupee weakens 5% against the dollar, your auto-converted ₹1,660 price becomes ₹1,743. Without intervention, your store-displayed price drifts. Apple periodically re-baselines storefront prices, but the timing is not predictable. Google leaves it to the developer unless auto-conversion is enabled.
Exchange rate for app pricing: long-tail considerations
- Countries with capital controls (Argentina, Turkey) have an official rate and a black-market rate that can diverge sharply. Apple uses the official rate; users live with the black-market reality.
- Volatile currencies (TRY, ARS, EGP) can shift 20% in a single month, blowing up your effective ARPU if you do not refresh prices.
- The IMF and World Bank publish real effective exchange rates (REER) that incorporate inflation. Useful for academic analysis, not for setting App Store prices directly.
How PricePush handles exchange rates
For every push, the live exchange rate is the input layer. We pull current FX, then layer PPP multipliers, currency rounding, and Apple's price-point ladder on top. The FX is the starting point, not the answer.
Examples
$19.99 base USD price at current exchange rates
Using approximate mid-market FX (live rates fluctuate):
| Country | Currency | Exchange rate (per USD) | FX-translated price | PPP-localized price |
|---|---|---|---|---|
| United States | USD | 1.00 | $19.99 | $19.99 |
| India | INR | 83 | ₹1,660 | ₹499 |
| Brazil | BRL | 4.90 | R$98 | R$39 |
| Turkey | TRY | 32 | ₺640 | ₺169 |
| Argentina | ARS | 990 (official) | $19,800 ARS | $4,800 ARS |
| Switzerland | CHF | 0.88 | CHF 17.59 | CHF 17.59 |
Notice Switzerland barely moves between FX and PPP. The FX-vs-PPP gap is largest in emerging markets, smallest in countries with purchasing power similar to the US.
Frequently asked
What is an exchange rate in simple terms?
An exchange rate is how much one currency costs in another. If 1 US dollar buys 83 Indian rupees today, the USD/INR exchange rate is 83. The number changes every second as currencies trade on global markets.
What exchange rate does the App Store use?
Apple uses its own internal FX feed and updates storefront prices periodically. The rate is close to mid-market but not identical, and Apple may re-baseline prices when FX shifts significantly. Google Play uses a similar internal feed with optional auto-conversion per region.
Why is using the exchange rate alone wrong for app pricing?
The exchange rate tells you the monetary equivalent. It does not tell you what users can actually afford. $19.99 converted to ₹1,660 looks fair to a US developer but lands as 3 to 5 times more expensive in purchasing-power terms for an Indian subscriber. That is why FX-based pricing under-converts in emerging markets.
How often does the exchange rate change?
Live FX changes every second during market hours. Reference rates (like the ECB's daily fix) update once per business day. Major shifts of more than 5% within a month are common in volatile currencies like TRY, ARS, or EGP, which is why prices using only FX drift quickly.
Further reading
- Real Localized Pricing: PPP Baselines + Prices That Feel LocalStore auto-conversion is currency math. Real localization is PPP-style baselines + rounding rules that land in familiar thresholds.
- Localized Pricing for Mobile Apps: The Complete GuideHow to set localized pricing for mobile apps across App Store and Google Play: PPP baselines, rounding rules, and a maintenance rhythm that scales.
- Most indie devs think the App Store already localizes their prices. It doesn't.Apple and Google convert your USD price at FX rates. That isn't regional pricing, and the gap is costing indie devs real revenue.