Touch RPN Android: Calculator flavors

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This app implements many flavors of RPN calculators. They used to be sold as apps: Touch Fin, Touch Palladium, Touch Fin Black-Scholes, Touch 10i, Touch 11i, Touch 15i and Touch 16i.

The app offers seven RPN flavors. Each one is available in two experiences: free (with ads) and purchased (without ads). To change the active flavor, press ON to go to Settings, select the option "Choose flavor" and then the desired flavor.

Figure 1: Menu of RPN flavors. The price of purchasable flavors will vary accordingly to user and country, and will be displayed in your local currency.

Figure 2: Menu of RPN flavors, second part. The price of purchasable flavors will vary accordingly to user and country, and will be displayed in your local currency.

Ready-to-use flavors are shown without a price. Flavors available for purchase show a price in your currency. If you want to release a paid flavor, touch it and follow the Google Play instructions. Once the purchase is confirmed, the flavor is activated right away.

Fast swap of flavor

If you have purchased two or more RPN flavors, you can activate the fast swap buttons. They are shortcuts to exchange between e.g. financial and scientific flavors without having to open the Settings panel.

Figure 3: Advanced Scientific RPN flavor with fast swap buttons enabled.

The fast swap shortcuts can be configured via the "Flavor fast swap buttons" panel of Settings. At most three flavors can be enabled to have shortcuts, and at most two shortcuts are shown on the main screen.

Figure 4: Settings subpanel where the fast swap buttons are chosen.

The fast swap buttons are completely disabled when any free flavor is in use.

Available flavors

Figure 5: Financial flavor (former Touch Fin app).

Figure 6: Advanced financial with algebraic mode (former Touch Fin Palladium app).

Figure 7: Financial flavor with Black-Scholes (former Touch Fin BS app).

The Black-Scholes flavor is "apocryphal" — there has never been a physical calculator with this layout. Read this instruction page to see how it works.

Figure 8: Scientific flavor (former Touch 11i app).

Figure 9: Advanced scientific flavor (former Touch 15i app).

Figure 10: Basic scientific flavor (former Touch 10i app).

Figure 11: Computer programmer‘s flavor (former Touch 16i app).