Comparison

DB50X vs One Balance

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

DB50X

This scientific calculator offers high-precision computations with arbitrary precision for numbers. It supports advanced functions like complex numbers, matrices, symbolic calculations, and graphing, with a user-friendly interface and extensive built-in help.

Highlights
  • Arbitrary precision calculations
  • RPN and algebraic operations
  • Complex numbers, vectors, matrices
  • Symbolic and numerical solving
  • Graphing and plotting
  • Engineering units and constants
  • Unicode text support
Features
Read full description

DB50X is a new high-precision scientific calculator inspired by the legendary HP50G series from Hewlett-Packard. It is not an emulator, but a redesign from scratch, which is faster, and delivers never seen before capabilities like computations in arbitrary precision. Like the original HP50G, DB48X supports an unlimited stack, RPN and algebraic operations, complex numbers, based numbers, vectors, matrices, text, symbolic computations, numerical solving and integration, graphing and plotting, statistics, engineering units, and well over 1000 built-in functions. It integrates a library of equations and constants covering mathematics, physics or chemistry. Using modern technologies, DB50X goes well beyond the original HP50G in many ways: - It is significantly faster, uses less memory, and features a higher-resolution 240x400 pixels graphical color display. - Integer and decimal values can have an arbitrarily large number of digits, so you can compute log(pi) with 200 digits in a few keystrokes. - The six function keys feature up to three function per key, giving quick access to up to 18 related functions at a time. - Complex numbers can mix and match polar and rectangular form. - Symbolic operations extend to complex numbers, vectors and matrices. - Based numbers can be in any base from 2 to 36, and support any number of bits, making it easy to emulate a 23-bit or 512-bit processor. - Text is represented using Unicode instead of the proprietary HP encoding, facilitating data exchange with the rest of the world. - Multiple graphs can be distinguished using colour patterns - Engineering units include all the modern evolutions of the SI system, and can be configured by the user, e.g. to integrate currency units with the exchange rate du jour. Converting between USD/hour and EUR/day has never been so easy! - A built-in hyperlinked help system documents functions simply by holding the corresponding key, and combine a quick start guide, a user manual and a reference manual. - Over 700K of memory is available for RPL programs. - Access to iCloud to save your program and edit them from your Mac. DB508X will run many user RPL programs designed for the HP48, HP49 or HP50 directly as is. However, since it is not an emulator, it will not run any HP binary object, and notably will not run HP50G games or anything involving system RPL. This is an early-access release. Please consult https://github.com/c3d/db48x/blob/stable/doc/5-Unimplemented.md for a list of commands that are not yet implemented. DB50X is part of a family of related calculators that include the black-and-white DB48X and the entry-level DB40X.

About

One Balance

This app connects to your device via Bluetooth to control its pointer color and switch. It also displays device information like color, time, and battery level. Account management includes logout and data deletion options.

Highlights
  • Bluetooth device connection
  • Pointer color control
  • Pointer switch control
  • Device information display
  • Account logout
  • Account deletion
Features
Read full description

Users can create accounts through One Balanchuan, which supports account logout and deletion (logging out of an account only means logging out, deleting an account will clear the information of the account locally and in the cloud). The main function of One Balanchuan is to connect the device Bluetooth, control the pointer switch, pointer color, etc. of the device, and the APP will display some device information, such as device color, device time, device battery level, etc One Balance controls the operation video link of specified devices:http://snjzxmozw.sabkt.gdipper.com/video/demonstrate.mp4

Screenshots

DB50X4 screens
One Balance1 screens

Verdict

The call

The clearest difference is price: One Balance at Free against DB50X's $9.99. DB50X's advantage is rating (5.0 vs 4.0) and ratings volume (8 vs 1). On update cadence, ads, in-app purchases and device support 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

CostPrice · In-app purchases · Ads · Monetization

One Balance is free to download; DB50X costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

DB50X holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: DB50X has 8 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

DB50X ships an update every 3 weeks, One Balance every 4 weeks. The most recent releases landed on October 25, 2026 and October 22, 2026 respectively.

Scorecard4 real differences · 6 level
DB50X versus One Balance: the parameters behind the verdict, then further details
ParameterDB50XOne Balance
Price$9.99Free — better
Rating5.0 (8 ratings) — better4.0 (1 ratings)
Positive reviews100.0% of reviews—
Number of ratings8 — better1
Update frequencyEvery 3 weeks — betterEvery 4 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS14.013.0 — better
Further details — not scored
Size7 MB69 MB
Age rating4+17+
DeveloperChristophe de Dinechinwallle

In-app purchases

None

DB50X

No in-app purchases

None

One Balance

No in-app purchases

Questions

Is DB50X free?
DB50X costs $9.99, with no in-app purchases.
Is One Balance free?
One Balance is free to download, with no in-app purchases.
Which has better reviews, DB50X or One Balance?
DB50X is rated higher. DB50X averages 5.0 out of 5 from 8 ratings, while One Balance averages 4.0 from 1 ratings.
Do DB50X or One Balance have ads?
Neither DB50X nor One Balance shows ads.
Which is updated more often, DB50X or One Balance?
DB50X ships an update every 3 weeks, and One Balance every 4 weeks. Most recently, DB50X was updated on October 25, 2026 and One Balance on October 22, 2026.

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