ODE Solver + vs PROG_CALC
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ODE Solver +
This utility app calculates ordinary differential equations using the Runge-Kutta method. It offers a step width of 0.01 for its calculations.
- Ordinary differential equation calculation
- Runge-Kutta method
- Step width 0.01
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It is calculated using Runge-Kutta method (step width 0.01).
PROG_CALC
This app offers a programmable calculator with two distinct modes for daily computing and advanced mathematical functions. It supports system conversions between binary, octal, decimal, and hexadecimal, and allows for variable storage and code sharing.
- Basic and advanced calculation modes
- Syntax parser
- Variable storage and editing
- Binary, octal, decimal, hexadecimal conversion
- Built-in code examples
- Code sharing via QR code or file
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The programming calculator provides two modes of operation. It has built-in basic operation functions, syntax parser, and supports a variety of application scenarios. 【Basic calculation】 Basic mode provides basic calculator functions for daily computing applications. 【Mathematical function】 Built-in rich mathematical functions, easy to implement basic calculations. 【Variable Storage】 Provides variable storage function, can store intermediate calculation results in basic mode, import and export with one key during application, and edit mode provides variable browsing function to easily grasp calculation results. 【System conversion】 Support binary, octal, decimal, hexadecimal conversion to meet the computing needs of different platforms. 【Code Example】 With built-in code writing examples, you can easily learn computing methods and expand application scenarios. 【Code Sharing】 The code can be shared through a QR code or a file, and the application also supports reading files directly, or scanning a QR code, which can be written on a computer and applied on a mobile phone.
Screenshots
Verdict
The clearest difference is rating: PROG_CALC at 5.0 against ODE Solver +'s 3.7. PROG_CALC also leads on ads (none vs shown) and monetization model (free vs ad-supported). ODE Solver +'s advantage is ratings volume (3 vs 1). On price, update cadence, in-app purchases and iOS requirement 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
PROG_CALC holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 3 and 1 respectively.
ODE Solver + ships an update weekly, PROG_CALC every 2 weeks. The most recent releases landed on September 25, 2026 and July 16, 2026 respectively.
| Parameter | ODE Solver + | PROG_CALC |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (3 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 3 — better | 1 |
| Update frequency | Weekly — better | Every 2 weeks |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 14.0 | 13 — better |
| Further details — not scored | ||
| Size | 11 MB | 78 MB |
| Age rating | 4+ | 4+ |
| Developer | Takahiko Nakade | 嘉欣 胡 |
Customer experience
ODE Solver +
PROG_CALC
In-app purchases
ODE Solver +
No in-app purchases
PROG_CALC
No in-app purchases
