Echo vs FormuLens
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Echo
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.
- Anniversary and countdown tracking
- Local reminders
- Diary entries with moods
- On This Day flashbacks
- Privacy-first local storage
- PDF export of diary
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Echo Days is the quiet home for your time: anniversaries, a diary, private memos, and Insights in one app you buy once and keep forever. No ads, no subscriptions, no accounts, and no cloud — everything you write stays on your device. WHY PAY ONCE Free apps make you pay with attention and data. Echo keeps it simple: one purchase unlocks every feature, forever. No monthly fees, no tracking — the app works for you, not for advertisers. ANNIVERSARIES Count-up days, countdowns, and yearly anniversaries, calculated automatically. Custom icons and local reminders mean the moments that matter never slip by. DIARY Write short entries with mood tags, link them to events, find anything with search and filters, and export the whole notebook to PDF. MEMOS Accounts, cards, documents, and plain notes in one place. Custom rows, pinning, search, and one-tap copy put what you need at your fingertips. INSIGHTS & ON THIS DAY See how your records are distributed, how often you write, and how your mood shifts — then revisit past years, one day at a time. PRIVATE BY DESIGN No account, no sync, nothing uploaded. A gesture lock keeps the whole app to yourself. 7 languages, ready for iPhone Duo and iPad. One purchase, a companion for years. Give your memories one calm, complete home.
FormuLens
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.
- 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
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Snap a photo of any ingredient label and see what every ingredient does, in plain language. FormuLens decodes INCI lists for skincare, makeup, hair care, body care, and fragrance, then helps you compare products and check how your routine works together. SCAN ANY INGREDIENT LABEL Take a photo or import one from your library. Long labels can span several photos, and FormuLens combines them into one list. Labels shot at any angle, even sideways or upside down, are turned upright automatically. READ K-BEAUTY AND J-BEAUTY LABELS FormuLens reads ingredient labels printed in English, French, Korean, Japanese, and Chinese (Simplified and Traditional). Each ingredient is translated to its English INCI name, with the printed name kept alongside. Results are always shown in English. UNDERSTAND EACH INGREDIENT See the role each ingredient plays in the formula: humectant, emollient, surfactant, preservative, exfoliant, antioxidant, sun protection, fragrance, and more. Key ingredients for the product type are starred, and unusual ones are flagged for a closer look. Tap any ingredient for a plain-language explanation and optional reference links. Sunscreen and SPF labels keep their Active and Inactive sections. KNOW THE FORMULA AT A GLANCE Each product gets a simple profile of hydration, active strength, gentleness, and complexity, plus quick tags such as Fragrance-Free, Contains Fragrance, Contains Exfoliants, Alcohol-Heavy, Avoid in Pregnancy, and Mineral, Chemical, or Hybrid Sunscreen. COMPARE PRODUCTS SIDE BY SIDE Wondering if a cheaper product is a close match for a pricey one? Compare up to 6 products of the same type to see shared ingredients, an overall similarity score, formula differences, and a plain-language verdict. CHECK YOUR ROUTINE Add up to 8 steps, from cleanser to sunscreen, and get a suggested layering order, alerts for ingredient pairs that may not mix well (like retinol with AHAs or vitamin C with benzoyl peroxide), overlap between steps, a build-up of EU-regulated fragrance allergens, and what your routine may be missing. SCAN A MIXED COLLECTION Sorting through a shelf or a new haul? Scan up to 6 products of any type at once and get a clear breakdown for each one. LOOK UP ANY INGREDIENT Search 1,000+ ingredients by INCI, French, Korean, Japanese, or Chinese name, or shorthands like AHA and BHA. Each profile covers what it does, where it matters most, pregnancy notes, known layering interactions, and links to learn more. SAVE YOUR PRODUCTS Keep analyzed products with a photo, custom name, tags, and notes. Search by name, tag, or ingredient, and filter by tag any time. PRIVATE BY DESIGN All analysis happens on your device. Your photos and scans never leave it. No account, no sign-up, no tracking. Works on iPhone and iPad, in light or dark mode. FormuLens is for general information only and is not medical advice. If you have a skin condition, allergy, or are pregnant or nursing, check with a doctor or pharmacist.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Echo | FormuLens |
|---|---|---|
| Price | $3.99 | Free — better |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | — | 1 — better |
| Update frequency | Every 6 weeks | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18.6 — better | 26.2 |
| Further details — not scored | ||
| Size | 3 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | 鹏 杨 | Bartlett Butter LLC |
Customer experience
Echo
FormuLens
In-app purchases
Echo
No in-app purchases
FormuLens
No in-app purchases









