# i Sound Level Meter vs Holdover Time

The clearest difference is rating: i Sound Level Meter at 4.4 against Holdover Time's 1.0. i Sound Level Meter also leads on in-app purchases (none vs 3) and review sentiment (22% vs 0%). Holdover Time's advantage is ads (none vs shown) and update cadence (every 2 weeks vs every 2 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Holdover Time sells 3 in-app purchases, starting at $4.99 per year. i Sound Level Meter asks for nothing beyond the download.

i Sound Level Meter holds the better App Store score, 4.4 against 1.0. That said, the two scores are not equally well evidenced: i Sound Level Meter has 38 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 22% of i Sound Level Meter's written reviews are positive against 0% of Holdover Time's.

i Sound Level Meter ships an update every 2 months, Holdover Time every 2 weeks. The most recent releases landed on November 9, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | i Sound Level Meter | Holdover Time |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (38 ratings)](https://appshunter.io/ios/app/i-sound-level-meter/id912170360/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/holdover-time/id1600468704/reviews) |
| Number of ratings | **38** | 1 |
| Positive reviews | **21.8% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 7 MB | 2 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [EONSOFT](https://appshunter.io/developer/899851112) | [Mohamed Farhadi](https://appshunter.io/developer/1191731876) |

## What reviewers say

### i Sound Level Meter

[App page](https://appshunter.io/ios/app/i-sound-level-meter/id912170360)

Measure ambient noise levels with your smartphone. Track maximum and minimum decibel readings to understand your sound environment. For best results, a high-performance meter is recommended.

**Highlights:** Measure ambient noise, Track max and min values, Noise meter functionality, Smartphone-based measurement

**Features:** Vision Pro support, iPhone Duo support

**In-app purchases:** none


### Holdover Time

[App page](https://appshunter.io/ios/app/holdover-time/id1600468704)

Calculate essential deicing holdover times with the latest FAA guidelines for the 2025-2026 winter season. This tool provides accurate calculations for various fluid types and includes a real-time countdown timer for enhanced situational awareness.

**Highlights:** Up-to-date FAA Holdover Time Guidelines (2025-2026), Calculations for Fluid Types II, III, & IV, Customized notes for specific fluids, Intuitive interface for aviation professionals, Real-time Holdover Time Countdown Timer, Ad-free experience

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hold Over Time Calculator | $4.99 | per year |
| Hold Over Time Calculator | Free | one-time |
| Holdover Time - Life Time | $24.99 | one-time |


## Frequently asked questions

### Is i Sound Level Meter free?

i Sound Level Meter is free to download, with no in-app purchases.

### Is Holdover Time free?

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

### Which has better reviews, i Sound Level Meter or Holdover Time?

i Sound Level Meter is rated higher. i Sound Level Meter averages 4.4 out of 5 from 38 ratings, while Holdover Time averages 1.0 from 1 ratings.

### Do i Sound Level Meter or Holdover Time have ads?

i Sound Level Meter shows ads; Holdover Time does not.

### Which is updated more often, i Sound Level Meter or Holdover Time?

i Sound Level Meter ships an update every 2 months, and Holdover Time every 2 weeks. Most recently, i Sound Level Meter was updated on November 9, 2026 and Holdover Time on November 3, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*