# Spark Water vs e

The clearest difference is rating: e at 5.0 against Spark Water's 3.0. e also leads on update cadence (every 2 months vs every 5 months). Spark Water's advantage is monetization model (free vs ad-supported) and iOS requirement (10.1 vs 15.6). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

e holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 3 respectively.

Spark Water ships an update every 5 months, e every 2 months. The most recent releases landed on October 3, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Spark Water | e |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/spark-water/id1209817279/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/e-sens/id1585074022/reviews)** |
| Number of ratings | 2 | **3** |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | **Free** | Ad-supported |
| Size | 49 MB | 32 MB |
| Requires iOS | **10.1** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [SPARK DIAGNOSTICS, LLC](https://appshunter.io/developer/1197766868) | [e-sens, Inc.](https://appshunter.io/developer/1479061797) |

## What reviewers say

### Spark Water

[App page](https://appshunter.io/ios/app/spark-water/id1209817279)

This app automatically reads water test strips using your smartphone camera, providing immediate and accurate results for pool and spa water chemistry. It helps you monitor trends and interpret results easily, ensuring optimal water balance without complex visual charts.

**Highlights:** Automatic test strip reading via camera, Immediate and accurate results, Trend monitoring with historical data, Simple color-coded result interpretation, Supports pool and spa water parameters

**Features:** macOS Compatibility

**In-app purchases:** none


### e

[App page](https://appshunter.io/ios/app/e-sens/id1585074022)

This tool allows water quality professionals to collect, manage, analyze, and track water quality test parameters. It is designed for water treatment facilities and professionals in the field.

**Highlights:** Water quality data collection, Data management, Analysis of test parameters, Tracking of water quality, Designed for professionals, Supports water treatment facilities

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

**In-app purchases:** none


## Frequently asked questions

### Is Spark Water free?

Spark Water is free to download, with no in-app purchases.

### Is e free?

e is free to download, with no in-app purchases.

### Which has better reviews, Spark Water or e?

e is rated higher. Spark Water averages 3.0 out of 5 from 2 ratings, while e averages 5.0 from 3 ratings.

### Do Spark Water or e have ads?

Neither Spark Water nor e shows ads.

### Which is updated more often, Spark Water or e?

Spark Water ships an update every 5 months, and e every 2 months. Most recently, Spark Water was updated on October 3, 2026 and e on October 6, 2026.

---

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