# Echo vs FormuLens

The clearest difference is price: FormuLens at Free against Echo's $3.99. Echo's advantage is iOS requirement (18.6 vs 26.2). On update cadence, ads, in-app purchases and device support there is nothing between them.

FormuLens is free to download; Echo costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Echo ships an update every 6 weeks, FormuLens every 5 weeks. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Echo | FormuLens |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/formulens-ingredient-scanner/id6783632029/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 5 weeks** |
| Monetization | Paid | **Free** |
| Size | 3 MB | 12 MB |
| Requires iOS | **18.6** | 26.2 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [鹏 杨](https://appshunter.io/developer/1884186063) | [Bartlett Butter LLC](https://appshunter.io/developer/1892734879) |

## What reviewers say

### Echo

[App page](https://appshunter.io/ios/app/echo-anniversary/id6760383873)

This app helps you track important dates like anniversaries and manage daily notes. It offers local reminders, diary entries with moods, and a "On This Day" feature to revisit past memories. The minimalist design keeps everything private and on your device.

**Highlights:** Anniversary and countdown tracking, Local reminders, Diary entries with moods, On This Day flashbacks, Privacy-first local storage, PDF export of diary

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

**In-app purchases:** none


### FormuLens

[App page](https://appshunter.io/ios/app/formulens-ingredient-scanner/id6783632029)

Decode cosmetic ingredient lists by scanning product labels. Understand the function of each ingredient, compare different formulas side-by-side, and organize your favorite products for informed skincare choices. All analysis is done on-device for privacy.

**Highlights:** Scan and decode ingredient lists, Understand ingredient functions, Compare product formulas side-by-side, Save and organize favorite products, Recognizes 800+ ingredients, On-device scanning, no internet needed

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

**In-app purchases:** none


## Frequently asked questions

### Is Echo free?

Echo costs $3.99, with no in-app purchases.

### Is FormuLens free?

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

### Do Echo or FormuLens have ads?

Neither Echo nor FormuLens shows ads.

### Which is updated more often, Echo or FormuLens?

Echo ships an update every 6 weeks, and FormuLens every 5 weeks. Most recently, Echo was updated on October 31, 2026 and FormuLens 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.*