# Simple Negative Image vs Blume

The clearest difference is in-app purchases: Simple Negative Image at none against Blume's 2. Simple Negative Image also leads on iOS requirement (15.6 vs 26.0). Blume's advantage is ads (none vs shown) and update cadence (every 4 days vs every 2 months). On price and device support there is nothing between them.

Both are free to download. Blume sells 2 in-app purchases, starting at $6.99 per month. Simple Negative Image asks for nothing beyond the download.

Simple Negative Image ships an update every 2 months, Blume every 4 days. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Simple Negative Image | Blume |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (122 ratings)](https://appshunter.io/ios/app/simple-negative-image/id6444569227/reviews)** | — |
| Number of ratings | **122** | — |
| Positive reviews | 55.6% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 4 days** |
| Monetization | Ad-supported | — |
| Size | 34 MB | 55 MB |
| Requires iOS | **15.6** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ryouhei Azuma](https://appshunter.io/developer/1353297781) | [Zachary Lehouillier](https://appshunter.io/developer/1840528290) |

## What reviewers say

### Simple Negative Image

[App page](https://appshunter.io/ios/app/simple-negative-image/id6444569227)

Easily invert image colors to create unique artistic effects. This tool allows for the inversion of negatives and positives, transforming ordinary photos into tasteful art-like creations. Perfect for users seeking straightforward image processing.

**Highlights:** Invert image colors, Create unique images, Generate art-like visuals, Process images easily, Invert negatives and positives

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

**In-app purchases:** none


### Blume

[App page](https://appshunter.io/ios/app/blume-baby-tracker/id6755359195)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Blume Premium | $6.99 | per month |
| Blume Premium | $34.99 | per year |


## Frequently asked questions

### Is Simple Negative Image free?

Simple Negative Image is free to download, with no in-app purchases.

### Is Blume free?

Blume is free to download, with in-app purchases available.

### Do Simple Negative Image or Blume have ads?

Simple Negative Image shows ads; Blume does not.

### Which is updated more often, Simple Negative Image or Blume?

Simple Negative Image ships an update every 2 months, and Blume every 4 days. Most recently, Simple Negative Image was updated on November 3, 2026 and Blume on November 5, 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.*