# SEM vs ChatPerplery

The clearest difference is in-app purchases: SEM at none against ChatPerplery's 3. ChatPerplery's advantage is update cadence (every 5 days vs every 2 weeks) and iOS requirement (12.0 vs 15.6). On price, ads and device support there is nothing between them.

Both are free to download. ChatPerplery sells 3 in-app purchases, starting at $6.99 per month. SEM asks for nothing beyond the download.

SEM ships an update every 2 weeks, ChatPerplery every 5 days. The most recent releases landed on September 9, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | SEM | ChatPerplery |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.4 (11 ratings)](https://appshunter.io/ios/app/sem-meter/id6468902139/reviews)** | — |
| Number of ratings | **11** | — |
| Positive reviews | 37.5% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 5 days** |
| Monetization | Free | — |
| Size | 31 MB | 24 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Hangzhou Dashi Wisdom Technology Co., Ltd.](https://appshunter.io/developer/1822219570) | [华蓉 成](https://appshunter.io/developer/1650236363) |

## What reviewers say

### SEM

[App page](https://appshunter.io/ios/app/sem-meter/id6468902139)

This utility app monitors your household power consumption in real-time, providing historical data and comparisons to help you save on electricity bills. It supports managing multiple devices and customizing electricity fee calculations.

**Highlights:** Real-time power usage monitoring, Historical energy use tracking, Second-to-second, day-to-day, week-to-week, month-to-month, and year-to-year comparisons, Electricity fee gradient calculation, Customizable fee templates, Multiple device management

**In-app purchases:** none


### ChatPerplery

[App page](https://appshunter.io/ios/app/chatperplery-your-answer/id6479387511)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VIP月会员 | $6.99 | per month |
| VIP季会员 | $9.99 | per 3 months |
| VIP年会员 | $19.99 | per year |


## Frequently asked questions

### Is SEM free?

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

### Is ChatPerplery free?

ChatPerplery is free to download, with in-app purchases available.

### Do SEM or ChatPerplery have ads?

Neither SEM nor ChatPerplery shows ads.

### Which is updated more often, SEM or ChatPerplery?

SEM ships an update every 2 weeks, and ChatPerplery every 5 days. Most recently, SEM was updated on September 9, 2026 and ChatPerplery on September 20, 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.*