# 橙子定投计算器 vs 背壳锁 BK

The clearest difference is in-app purchases: 背壳锁 BK at none against 橙子定投计算器's 5. 背壳锁 BK also leads on ads (none vs shown) and update cadence (daily vs every 3 weeks). On price and device support there is nothing between them.

Both are free to download. 橙子定投计算器 sells 5 in-app purchases, starting at $0.99 per year. 背壳锁 BK asks for nothing beyond the download.

橙子定投计算器 ships an update every 3 weeks, 背壳锁 BK daily. The most recent releases landed on September 8, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | 橙子定投计算器 | 背壳锁 BK |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/id1617445993/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Daily** |
| Size | 11 MB | 86 MB |
| Requires iOS | 18.0 | **12.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [川 周](https://appshunter.io/developer/1611546897) | [广东必达保安系统有限公司](https://appshunter.io/developer/1252551530) |

## What reviewers say

### 橙子定投计算器

[App page](https://appshunter.io/ios/app/id1617445993)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Yearly | $0.99 | per year |
| Breakfast × 1 | $0.99 | one-time |
| Lunch × 1 | $2.99 | one-time |
| Dinner × 1 | $5.99 | one-time |
| MidnightSnack × 1 | $9.99 | one-time |


### 背壳锁 BK

[App page](https://appshunter.io/ios/app/bk/id6753927706)

**In-app purchases:** none


## Frequently asked questions

### Is 橙子定投计算器 free?

橙子定投计算器 is free to download, with in-app purchases available.

### Is 背壳锁 BK free?

背壳锁 BK is free to download, with no in-app purchases.

### Do 橙子定投计算器 or 背壳锁 BK have ads?

橙子定投计算器 shows ads; 背壳锁 BK does not.

### Which is updated more often, 橙子定投计算器 or 背壳锁 BK?

橙子定投计算器 ships an update every 3 weeks, and 背壳锁 BK daily. Most recently, 橙子定投计算器 was updated on September 8, 2026 and 背壳锁 BK on September 22, 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.*