# ODE Solver + vs PROG_CALC

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.

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.

## The numbers

| Metric | ODE Solver + | PROG_CALC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (3 ratings)](https://appshunter.io/ios/app/ode-solver-plus/id1549447510/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/prog-calc/id1640426491/reviews)** |
| Number of ratings | **3** | 1 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 2 weeks |
| Monetization | Ad-supported | **Free** |
| Size | 11 MB | 78 MB |
| Requires iOS | 14.0 | **13** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Takahiko Nakade](https://appshunter.io/developer/1513184888) | [嘉欣 胡](https://appshunter.io/developer/1640395440) |

## What reviewers say

### ODE Solver +

[App page](https://appshunter.io/ios/app/ode-solver-plus/id1549447510)

This utility app calculates ordinary differential equations using the Runge-Kutta method. It offers a step width of 0.01 for its calculations.

**Highlights:** Ordinary differential equation calculation, Runge-Kutta method, Step width 0.01

**In-app purchases:** none


### PROG_CALC

[App page](https://appshunter.io/ios/app/prog-calc/id1640426491)

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.

**Highlights:** 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

**In-app purchases:** none


## Frequently asked questions

### Is ODE Solver + free?

ODE Solver + is free to download, with no in-app purchases.

### Is PROG_CALC free?

PROG_CALC is free to download, with no in-app purchases.

### Which has better reviews, ODE Solver + or PROG_CALC?

PROG_CALC is rated higher. ODE Solver + averages 3.7 out of 5 from 3 ratings, while PROG_CALC averages 5.0 from 1 ratings.

### Do ODE Solver + or PROG_CALC have ads?

ODE Solver + shows ads; PROG_CALC does not.

### Which is updated more often, ODE Solver + or PROG_CALC?

ODE Solver + ships an update weekly, and PROG_CALC every 2 weeks. Most recently, ODE Solver + was updated on September 25, 2026 and PROG_CALC on July 16, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*