# Watercolour Reference vs e

The clearest difference is review sentiment: e at 100% against Watercolour Reference's 39%. e also leads on price (Free vs $1.99) and in-app purchases (none vs 4). Watercolour Reference's advantage is iOS requirement (12.0 vs 15.0). On update cadence, ads and device support there is nothing between them.

e is free to download; Watercolour Reference costs $1.99 up front. Watercolour Reference sells 4 one-off in-app purchases. e asks for nothing beyond the download.

Watercolour Reference ships an update every 4 months, e every 3 months. The most recent releases landed on September 28, 2026 and August 13, 2026 respectively.

## The numbers

| Metric | Watercolour Reference | e |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[2.0 (4 ratings)](https://appshunter.io/ios/app/watercolour-reference/id467961113/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 38.9% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 7 MB | 53 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Oliver Shingler](https://appshunter.io/developer/886565740) | [Centre for Ecology and Hydrology](https://appshunter.io/developer/986306797) |

## What reviewers say

### Watercolour Reference

[App page](https://appshunter.io/ios/app/watercolour-reference/id467961113)

This app aids watercolour artists by providing data on individual colour characteristics and suggesting colour mixes. It features a paint mixing simulation and offers tips for various painting topics, with Apple Watch integration for quick reference.

**Highlights:** Colour characteristic data, Suggested colour mixes, Paint mixing simulation, Apple Watch integration, Portrait and flower painting combinations, General watercolour database

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buildings | $0.99 | one-time |
| Seascapes | $0.99 | one-time |
| Snowy Landscapes | $0.99 | one-time |
| Summer Landscapes | $0.99 | one-time |


### e

[App page](https://appshunter.io/ios/app/e-surveyor/id1539907283)

Assess the quality of your farm's wildflower habitat using image recognition and a comprehensive plant database. Generate reports on habitat quality based on identified plants and seed mixes.

**Highlights:** Image recognition of plants, Rich plant and seed mix data, Habitat quality reporting, Farm habitat assessment, Wildflower identification

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Watercolour Reference free?

Watercolour Reference costs $1.99, and also offers in-app purchases.

### Is e free?

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

### Do Watercolour Reference or e have ads?

Neither Watercolour Reference nor e shows ads.

### Which is updated more often, Watercolour Reference or e?

Watercolour Reference ships an update every 4 months, and e every 3 months. Most recently, Watercolour Reference was updated on September 28, 2026 and e on August 13, 2026.

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