# 最美证件照 vs ODE Solver +

The clearest difference is in-app purchases: ODE Solver + at none against 最美证件照's 2. ODE Solver + also leads on update cadence (weekly vs every 14 months). 最美证件照's advantage is ads (none vs shown) and iOS requirement (10.0 vs 14.0). On price and device support there is nothing between them.

Both are free to download. 最美证件照 sells 2 in-app purchases, starting at $2.49 per 7 days. ODE Solver + asks for nothing beyond the download.

最美证件照 ships an update every 14 months, ODE Solver + weekly. The most recent releases landed on September 19, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | 最美证件照 | ODE Solver + |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.7 (3 ratings)](https://appshunter.io/ios/app/ode-solver-plus/id1549447510/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 14 months | **Weekly** |
| Monetization | — | Ad-supported |
| Size | 22 MB | 11 MB |
| Requires iOS | **10.0** | 14.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [乐赞 操](https://appshunter.io/developer/1521791831) | [Takahiko Nakade](https://appshunter.io/developer/1513184888) |

## What reviewers say

### 最美证件照

[App page](https://appshunter.io/ios/app/id1549355634)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 每周高级功能 | $2.49 | per 7 days |
| 每年高级功能 | $40.99 | per year |


### 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


## Frequently asked questions

### Is 最美证件照 free?

最美证件照 is free to download, with in-app purchases available.

### Is ODE Solver + free?

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

### Do 最美证件照 or ODE Solver + have ads?

ODE Solver + shows ads; 最美证件照 does not.

### Which is updated more often, 最美证件照 or ODE Solver +?

最美证件照 ships an update every 14 months, and ODE Solver + weekly. Most recently, 最美证件照 was updated on September 19, 2026 and ODE Solver + on September 25, 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.*