# SPL vs D

The clearest difference is price: D at Free against SPL's $8.99. D also leads on update cadence (every 2 months vs every 6 months). SPL's advantage is iOS requirement (15.0 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

D is free to download; SPL costs $8.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SPL ships an update every 6 months, D every 2 months. The most recent releases landed on September 23, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | SPL | D |
| --- | --- | --- |
| Price | $8.99 | **Free** |
| Rating | **[3.0 (4 ratings)](https://appshunter.io/ios/app/spl/id293573990/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 67.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 months** |
| Monetization | Paid | — |
| Size | 29 MB | 33 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Andrew Smith](https://appshunter.io/developer/291822462) | [Yamaha Corporation](https://appshunter.io/developer/353469356) |

## What reviewers say

### SPL

[App page](https://appshunter.io/ios/app/spl/id293573990)

This professional-grade digital sound level meter measures decibels with advanced modes and filters meeting ANSI Type 1 standards. It allows storing, exporting, and calibrating measurements, and can be used with external calibrated microphones for precise results.

**Highlights:** Professional-grade digital sound level meter, ANSI/IEC Type 1 standards compliant filters and modes, Store, recall, and export GPS/time-stamped results, Supports external calibrated microphones, Adjustable calibration for accuracy, Internal mic compensation filter

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

**In-app purchases:** none


### D

[App page](https://appshunter.io/ios/app/d-remote/id6745768913)

**In-app purchases:** none


## Frequently asked questions

### Is SPL free?

SPL costs $8.99, with no in-app purchases.

### Is D free?

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

### Do SPL or D have ads?

Neither SPL nor D shows ads.

### Which is updated more often, SPL or D?

SPL ships an update every 6 months, and D every 2 months. Most recently, SPL was updated on September 23, 2026 and D on September 8, 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.*