Decibels vs WaitIO
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Decibels
Measure and analyze ambient noise levels with a stylish interface. Capture photos with sound level data, and share or print your findings. Enhance analysis with advanced features like frequency weighting and chart recording through an in-app purchase.
- Analog dB(A) display
- Photo with sound level
- Share/print/store photos
- Select frequency weightings (A, C, Z)
- Record decibels on strip charts
- Annotate strip charts
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Want to know what noise level is around you? in the restaurant? in the train? in the office? This app will show you with precision & style. Features: - Smooth analog display of dB(A) - Take photo with sound level display - Share, print, and store sound level photos Extra Features (with purchase): - Select frequency weightings A, C, and Z - Record decibels on beautiful strip charts - Annotate the strip charts - Share, print, and store the strip charts This app uses the internal microphone to estimate the sound pressure level in decibels (dB SPL). Examples: - quiet bedroom at night: 30 dB - average home: 50 dB - vacuum cleaner, 1m away: 70 dB - jet aircraft, 50 m away: 140 dB
WaitIO
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WaitIO helps you measure and track real waiting time. Find out how long it truly takes to wait for a meeting, celebration, event, or any anticipated moment. Create a moment, let time run, and get notified when the wait is over. WaitIO is built for speed and simplicity. No accounts. No clutter. Just time. What you can do with WaitIO: • Create a moment in one tap • Track waiting time precisely • Receive notifications when a moment ends • Manage your moments • View your full waiting history • Use the app fully offline Whether you’re tracking delays or counting down to something important, WaitIO keeps waiting clear and effortless.
Screenshots
Verdict
The clearest difference is in-app purchases: WaitIO at none against Decibels's 2. Decibels's advantage is update cadence (weekly vs every 3 weeks) and iOS requirement (11.0 vs 17.5). On price, ads and device support 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. Decibels sells 2 one-off in-app purchases. WaitIO asks for nothing beyond the download.
Decibels ships an update weekly, WaitIO every 3 weeks. The most recent releases landed on September 23, 2026 and June 1, 2026 respectively.
| Parameter | Decibels | WaitIO |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (261 ratings) — better | — |
| Positive reviews | 66.9% of reviews | — |
| Number of ratings | 261 — better | — |
| Update frequency | Weekly — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 11.0 — better | 17.5 |
| Further details — not scored | ||
| Size | 18 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | David Bannach | Nerdz |
Bugs and requests
Decibels
Reported bugs
3 issues- Crashes when trying to save images
- Compatibility issues with newer iOS versions
- Needle getting stuck at certain levels
Requested features
5 requests- Digital readout in addition to analog meter
- Ability to save/export measurement history
- Support for different weighting scales (A, C, Z)
- Landscape mode support
- Customizable appearance options
WaitIO
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Decibels
- Professional Controls$1.99
- Beautiful Strip Chart Recorder$2.99
WaitIO
No in-app purchases
