i Sound Level Meter vs Holdover Time
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
i Sound Level Meter
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.
- Measure ambient noise
- Track max and min values
- Noise meter functionality
- Smartphone-based measurement
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The noise meter (noise measuring aparatus). There may be an error of measurement for each smart phone. You can measure how much noise around him. You can check the maximum and minimum values to start You noise measurements. It is recommended to use a high-performance noise meter for accurate noise measurement.
Holdover Time
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.
- 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
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Holdover Time Calculator – FAA Winter 2025-2026 Stay prepared this winter with the latest FAA Holdover Time Guidelines for the 2025-2026 season. Our app makes it easy to calculate Holdover Times (HOT) and Allowance Times in just a few steps. Key Features: Up-to-Date FAA Tables: Includes the official FAA Holdover Time Guidelines for Winter 2025-2026. Fluid Types II, III & IV: Unlock full HOT tables with detailed fluid performance data. Customized Notes: Get tailored guidance and notes for the specific fluids and tables you are using. Simple & Reliable: Quickly calculate HOT with an intuitive interface designed for aviation professionals. Always Current: Updated regularly to reflect the most recent FAA revisions. Ad-Free Experience: No distractions, just the tools you need. New Feature: Added a Holdover Time Countdown Timer — visually track your deicing holdover period in real time, with color indicators and pause/resume controls for improved situational awareness. Perfect For: Pilots, dispatchers, ground crews, and aviation professionals who rely on accurate de/anti-icing guidance for safe operations. Take the guesswork out of winter operations. Download now and access the latest FAA HOT tables for 2025-2026 — with continuous updates as new data becomes available. Terms of Use (EULA): https://www.skyhightex.com/hot-privace-policy-eula/
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | i Sound Level Meter | Holdover Time |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (38 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 21.8% of reviews — better | 0.0% of reviews |
| Number of ratings | 38 — better | 1 |
| Update frequency | Every 2 months | Every 2 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 7 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | EONSOFT | Mohamed Farhadi |
Customer experience
i Sound Level Meter
Holdover Time
In-app purchases
i Sound Level Meter
No in-app purchases
Holdover Time
- Hold Over Time Calculator$4.991 Year
- Hold Over Time CalculatorFree
- Holdover Time - Life Time$24.99
Questions
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