Trigonometry
I love the nice clean look of your calculator. How ever I can’t make head nor tail of your trig functions. Are you using the traditional functions? For example, it keeps telling me the sin of 45 deg is 0.8509 and cos 45 is 0.5253. How are you getting this?
Ersatz HP Taschenrechner
Sehr guter Ersatz für meinen alten HP Taschenrechner
HCalc Lite
Top Emulation des legendären HP 28-S.
Einzig störend, dass sich der Tastenton nicht abstellen lässt.
Einzig störend, dass sich der Tastenton nicht abstellen lässt.
La vieja 28C vuelve a la vida
Todavía tengo en funcionamiento mi vieja 28C. Tener esta app permite darle nueva vida en lugar de estar aparcada en un cajón. Llegué a dominar bien la programación RPN (tipo FORTH) de esta calculadora y se echa de menos todo el potencial que permitía. Esperemos que la app con el tiempo la incorpore.
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Toller programmierbarer Rechner
Ich habe einen echten HP-28S und diese APP ist die beste Umsetzung für iPhone und iPad im AppStore. Sehr gut zu bedienender UPN-Rechner mit vielen Funktionen des Originals.
Splendid Simulation of a HP-28S
This is a close to perfect simulation of the venerable and highly successful HP-28S, which is the grand dad of the most advanced series of HP’s scientific RPN graphing calculators. Being a genuine simulation and not a simple emulation working with the old ROM, this little beast is running at full speed and makes good use if the iOS’ native screen resolution and larger display. In brief it’s a charm to work with for anyone used to HP’s series of RPN calculators. It’s fully programmable, deals with complex numbers, matrices and arrays, and it’s able of plotting full screen, including pinch&zoom&scroll.
The developer has been implementing most HP28s functions, and the few that are still missing don’t hurt too much (e.g. the ALGEBRA menu, but for this one might be better of with a dedicated CAS system anyway). Only drawback is its name - no one would guess to find a full-fledged HP28 simulator behind something called Halcyon, and also the icon does not hint at its true origins.
So in brief this is highly recommended to any HP enthusiast. The original HP28 layout with the separate alphanumeric keypad makes it very easy to use. It runs natively and makes full use of the iOs graphics display and resolution to its advantage (gestures, copy, paste, scrolling etc).
The developer has been implementing most HP28s functions, and the few that are still missing don’t hurt too much (e.g. the ALGEBRA menu, but for this one might be better of with a dedicated CAS system anyway). Only drawback is its name - no one would guess to find a full-fledged HP28 simulator behind something called Halcyon, and also the icon does not hint at its true origins.
So in brief this is highly recommended to any HP enthusiast. The original HP28 layout with the separate alphanumeric keypad makes it very easy to use. It runs natively and makes full use of the iOs graphics display and resolution to its advantage (gestures, copy, paste, scrolling etc).
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I had the hp28s. This is a good replica
Pros: look and acts like the hp 28s.
Cons: free version is too locked down to tell how well it works. I would have like to tried out other features, but that requires at least 1 upgrade possibly more. I could not tell for sure. I would pass on this one since I cannot tell how well it will work.
Cons: free version is too locked down to tell how well it works. I would have like to tried out other features, but that requires at least 1 upgrade possibly more. I could not tell for sure. I would pass on this one since I cannot tell how well it will work.
buena calculadora
Es la calculadora HP28, es fantastica!. tengo la original de HP, y se me acabo las baterias. quizas ahora ya no sustitulla las baterias porque tengo la misma en el iPad, aunque el tacto de las teclas no lo pueden superar.
Realiza las mismas funciones, y ademas hace uso de las posibilidades que brinda en iPad, haciendola mas manejable. Por ejemplo cuando graficas una funcion puedes manipular la pantalla de representacion con los dedos, y otras caracteristicas por el estilo.
Tiene arriba una pequella barra de publicidad.
Realiza las mismas funciones, y ademas hace uso de las posibilidades que brinda en iPad, haciendola mas manejable. Por ejemplo cuando graficas una funcion puedes manipular la pantalla de representacion con los dedos, y otras caracteristicas por el estilo.
Tiene arriba una pequella barra de publicidad.
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HP 28S Calculator Replica
Just like the last reviewer, I had a HP 28S since 1989. It bit the dust last year. This is an exact replica! If you do not understand (RPN - Reverse Polish Notation) you will be confused like Phat Dude. Take some time to learn RPN, you will find it straight forward and easy to use.
Love the HP 28S
I've used my HP 28S for three decades. I'm thrilled to find an app that emulates this classic scientific calculator. I haven't used the app much yet, but I'm looking forward to testing its features.
Crap on a Stick😡
I don't like this app but my algebra teacher sed to get it but its way too complicated😤
bbye!
not replacing my 1st gen ipad. can't follow you into 6.0
deleting.
deleting.
