SPL vs Water Remover
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SPL
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.
- 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
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SPL is a professional-grade digital sound level meter (decibel meter) for your iPad, iPhone or iPod touch. It includes all of the modes, filters, and features that you would expect from a professional ANSI or IEC Sound Level Meter. All filters and averaging modes meet or exceed the criteria for ANSI Type 1 standards or better. SPL is created from the same team who brought you the Audio Toolbox and ATB Plus. Store Results -- Uses the same powerful Save / Recall engine as our premier app, AudioTools. Allows storing GPS and time-stamped results, and exporting them to your computer. You can also use SPL with our calibrated iPhone measurement mic, iTestMic, or iAudioInterface. The screen flips if you turn the phone upside down, so that you can point the built-in iPhone mic directly at the sound source. *** Modes: Slow, Fast, Impulse, Peak, and Leq. *** Filters: A and C weighting, and 10 octave band filters. *** Includes a resettable Max field to track the highest reading. *** Includes a reference field (except in Leq mode) so that you can set a reference level and do seat-to-seat comparisons. The SPL meter can be fully calibrated. It comes preset with the calibration for a typical iPad, iPhone, and iPod Touch. Most iOS devices will be within a few dB of this reading. If you have access, even temporarily, to a calibrated sound level meter, just use the calibration field on the settings scree to match the meter, and you will be accurately calibrated. Also, see our other professional-grade audio apps: AudioTools, our premier suite of professional-caliber audio and acoustics test apps, Speaker Pop, to test speaker polarity, and RTA, a real-time analyzer for the iPhone. And, we have a group of calibrated, accurate measurement microphones, including iTestMic,iTestMic2, and iAudioInterface2, that allows full professional results for Type 1 or Type 2 measurements. This will allow measuring a range from approximately 30 dB SPL to 130 dB SPL. Each mic will include a calibration factor that you will enter into the SPL app for calibrated measurements. This mic will also work with Speaker Pop, our speaker polarity tester, FFT, RTA, ETC, and other acoustical measurement apps in our AudioTools app that is available now. Also, see our iAudioInterface2 system, which supports any pro test and measurement mic. Now includes an iPhone internal mic compensation filter, to cancel out the low-frequency roll-off present in the iPhone and other iOS devices. See our other audio apps, including AudioTools.
Water Remover
Test your speakers and microphones with specialized sound frequencies. Measure sound in decibels and Hz to assess speaker quality and detect damage. Identify potential microphone issues.
- Speaker testing sounds
- Microphone testing
- Decibel measurement
- Hz frequency analysis
- Sound quality assessment
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This app will play sounds that can help you test your speakers correctly with good efficiency We have well designed sound that can help you go with the tests With this app , you can also measure sound in decibel HZ value so you can figure out speaker quality or any damage You can also find out if the microphone on your phone is not working or in bad condition. Subscription Policy - Subscriptions are billed weekly or monthly at the rate selected depending on the subscription plan. - Payment will be charged to iTunes Account at confirmation of purchase - Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal - Subscriptions auto-renew at the cost of the chosen package, unless cancelled 24-hours in advance prior to the end of the current period. Subscriptions may be managed by going to your iTunes Account Settings after purchase. You may manage your subscription and turn off auto-renewal by going to your Account Settings after purchase. Privacy Policy - http://temptracker.nextpixelapps.in/?page_id=33 Service Terms - http://temptracker.nextpixelapps.in/?page_id=31
Screenshots
Verdict
The clearest difference is price: Water Remover at Free against SPL's $8.99. Water Remover also leads on rating (4.2 vs 3.0) and ratings volume (103 vs 4). SPL's advantage is in-app purchases (none vs 2) and review sentiment (68% vs 50%). On 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
Water Remover is free to download; SPL costs $8.99 up front. Water Remover sells 2 in-app purchases, starting at $5.99 per 7 days. SPL asks for nothing beyond the download.
Water Remover holds the better App Store score, 4.2 against 3.0. That said, the two scores are not equally well evidenced: Water Remover has 103 ratings behind it against 4, so its average is the more settled of the two. Written reviews complicate that: 68% of SPL's written reviews are positive against 50% of Water Remover's, so the app with the better star average is not the one people write more warmly about.
SPL ships an update every 6 months, Water Remover every 2 months. The most recent releases landed on October 31, 2026 and November 3, 2026 respectively.
| Parameter | SPL | Water Remover |
|---|---|---|
| Price | $8.99 | Free — better |
| Rating | 3.0 (4 ratings) | 4.2 (103 ratings) — better |
| Positive reviews | 67.6% of reviews — better | 50.0% of reviews |
| Number of ratings | 4 | 103 — better |
| Update frequency | Every 6 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Freemium — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 30 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Andrew Smith | NextPixel apps |
Customer experience
SPL
Water Remover
In-app purchases
SPL
No in-app purchases
Water Remover
- Weekly plan$5.997 Days
- Monthly Plan3 Days trial$9.991 Month









