Sampling Calculator vs CVWD Responds
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sampling Calculator
This tool helps calculate sampling plans based on ANSI/ASQ Z1.4 and MIL-STD-105E standards. It supports various sampling size code letters and AQLs for normal, tightened, and reduced inspections. It serves as an aid to understanding and applying these quality control standards.
- ANSI/ASQ Z1.4 2013 compliance
- MIL-STD-105E compliance
- Single sampling size code letters
- Normal, Tightened, and Reduced inspection
- AQLs from 0.065 to 15
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The sampling calculator conforms to ANSI/ASQ Z1.4 2013 and MIL-STD-105E Standards. NOTE: This calculator may be used as an aid to faster calculate the sampling plan needed, and always in conjunction or with the basic knowledge of the ANSI/ASQ Z1.4 standard. It does not replace the standards mentioned above. The sampling calculator covers single sampling size code letters I, II, III, S1, S2, S3 and S4. Normal, Tightened and Reduced with AQLs from 0.065 to 15.
CVWD Responds
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The Cucamonga Valley Water District has launched "CVWD Responds" to respond to water related issues in the community. Users identify and report issues with their smartphone, and "CVWD Responds" to the inquiry. Reportable issues include water leaks, broken sprinklers, excessive runoff, and minor sewer issues. Download it today!
Screenshots
Verdict
The clearest difference is price: CVWD Responds at Free against Sampling Calculator's $5.99. CVWD Responds also leads on iOS requirement (9.0 vs 15.6). Sampling Calculator's advantage is ads (none vs shown) and chart position (#173 vs unranked). On update cadence, in-app purchases 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
CVWD Responds is free to download; Sampling Calculator costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Sampling Calculator ships an update every 16 months, CVWD Responds every 19 months. The most recent releases landed on September 10, 2026 and September 17, 2026 respectively.
| Parameter | Sampling Calculator | CVWD Responds |
|---|---|---|
| Price | $5.99 | Free — better |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 16 months — better | Every 19 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Best chart rank | #173 — better | — |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.6 | 9.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | Juan Manuel Alfredo Sanchez | Cucamonga Valley Water District |
In-app purchases
Sampling Calculator
No in-app purchases
CVWD Responds
No in-app purchases
Questions
Is Sampling Calculator free?
Is CVWD Responds free?
Do Sampling Calculator or CVWD Responds have ads?
Which is updated more often, Sampling Calculator or CVWD Responds?
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