# Sound Meter (SPL meter) vs AI记忆

The clearest difference is price: AI记忆 at Free against Sound Meter (SPL meter)'s $0.99. AI记忆 also leads on in-app purchases (none vs 1) and ads (none vs shown). Sound Meter (SPL meter)'s advantage is device support (3 vs 1) and iOS requirement (13.0 vs 17.0).

AI记忆 is free to download; Sound Meter (SPL meter) costs $0.99 up front. Sound Meter (SPL meter) sells 1 one-off in-app purchase. AI记忆 asks for nothing beyond the download.

Sound Meter (SPL meter) ships an update every 6 weeks, AI记忆 every 5 days. The most recent releases landed on October 24, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Sound Meter (SPL meter) | AI记忆 |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Positive reviews | 28.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Every 5 days** |
| Monetization | Ad-supported | — |
| Size | 25 MB | 3 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [庆鸿 林](https://appshunter.io/developer/1558629938) | [爽 周](https://appshunter.io/developer/1877823315) |

## What reviewers say

### Sound Meter (SPL meter)

[App page](https://appshunter.io/ios/app/sound-meter-spl-meter/id1558634102)

This utility app uses your device's microphone to measure ambient noise levels in decibels. It displays readings with graphical representations and provides historical data like minimum, average, and maximum values. Calibration options are available for different devices.

**Highlights:** Measures noise in decibels (dB), Displays decibel readings on a gauge, Shows current, min, avg, and max dB values, Graphs decibel levels over time, Tracks elapsed time of measurements, Allows device-specific decibel calibration

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Access | $0.99 | one-time |


### AI记忆

[App page](https://appshunter.io/ios/app/ai-aimemo/id6761813428)

**In-app purchases:** none


## Frequently asked questions

### Is Sound Meter (SPL meter) free?

Sound Meter (SPL meter) costs $0.99, and also offers in-app purchases.

### Is AI记忆 free?

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

### Do Sound Meter (SPL meter) or AI记忆 have ads?

Sound Meter (SPL meter) shows ads; AI记忆 does not.

### Which is updated more often, Sound Meter (SPL meter) or AI记忆?

Sound Meter (SPL meter) ships an update every 6 weeks, and AI记忆 every 5 days. Most recently, Sound Meter (SPL meter) was updated on October 24, 2026 and AI记忆 on October 4, 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.*