Variables vs Evthi
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Variables
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Variables is a simple way to track anything and actually understand it. Most habit trackers ask "did you succeed?" This one just asks "what happened?" Log whatever matters to you—sleep, mood, coffee, pages read, workouts, anything—and look for patterns later. How it works Create variables with flexible data types: numbers, durations, categories, yes/no, or freeform notes. Log values whenever you remember. No streaks to break, no guilt when you miss a day. A low number is just data, not a failure. Over time, you build up a picture of what your life actually looks like. Then you can start asking questions. Voice logging Tap the microphone and say something like "slept 7 hours, mood good, read 30 pages." The app parses it automatically and logs each value to the right variable. No typing required. Ask questions in plain English "Do I sleep better when I exercise?" "What's my average mood on Mondays?" "How much coffee did I drink last week?" The app translates your question into a database query and gives you the answer. Features - Flexible variable types: numbers, durations, enums, booleans, text - Voice input with automatic parsing - Natural language queries (or write SQL directly if you prefer) - Goal tracking with weekly targets - Analytics dashboard with trends and streaks - Calendar view of your logged data - Dark mode - API access for custom integrations - Self-hostable if you want full control of your data
Evthi
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Evthi brings the scattered pieces of your life together in one place: notes, money, documents, reminders and projects. And all of it stays only on your phone, encrypted. EVERYTHING IN ONE PLACE • Notes: Headings, lists, to-dos, tables and images; add voice notes, locations and reminders. Scan text from paper with your camera and drop it into a note. • Finance: Track income and expenses, sort them into categories, set budgets, and keep an eye on subscriptions and recurring payments. Get a heads-up when you reach 80% of a budget. • Documents: IDs, contracts, invoices, warranties… Scan with your camera and edges are cropped automatically; even the text inside scanned documents shows up in search. Get reminded before expiry and renewal dates. • Reminders: Tasks with due dates, recurring chores, and one-tap "Done" or "Snooze" right from the notification. • Projects: Bring notes, expenses, documents and tasks together under one project. • Inventory: Keep your belongings, their photos and warranty periods. • Calendar and search: All your records in one calendar, one search. • Quick Capture: Type what's on your mind; Evthi prepares it as an expense, a reminder or a note, and you save it with one tap. • And more: goals, loans and debts, and Digital Memory. BY YOUR SIDE EVERY DAY • Morning summary: today's reminders, upcoming payments and documents about to expire, in one notification each morning. • Home Screen and Lock Screen widgets and a Control Center button: add something in one tap without opening the app. PRIVACY COMES FIRST • Your data is stored on your phone, encrypted with AES-256. • No account needed; we never ask for your email. • No ads, no tracking, no data collection. • Scanning and text recognition happen on your phone; no image is ever sent to the internet. • App lock with Face ID or PIN; hidden notes and a hidden Wallet section. YOUR DATA IS YOURS • Create a single-file backup, protect it with a password if you like, and restore it on a new phone. • Export notes as PDF and finance records as Excel or CSV, including loans, subscriptions, budgets and goals. SIMPLE AND CLEAR Evthi doesn't bury you in settings: open it, type, find it. Dark mode and 7 languages (English, Turkish, German, French, Russian, Japanese, Chinese). Evthi is designed for iPhone. One-time purchase. No ads. Questions or ideas? Write to info@evthi.com.
Screenshots
Verdict
The clearest difference is price: Variables at Free against Evthi's $2.99. Evthi's advantage is update cadence (every 9 days vs every 3 months) and iOS requirement (15.5 vs 17.0). On 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
Variables is free to download; Evthi costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Variables ships an update every 3 months, Evthi every 9 days. The most recent releases landed on November 5, 2026 and November 10, 2026 respectively.
| Parameter | Variables | Evthi |
|---|---|---|
| Price | Free — better | $2.99 |
| Update frequency | Every 3 months | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, Apple Watch — better | iPhone, iPod |
| Requires iOS | 17.0 | 15.5 — better |
| Further details — not scored | ||
| Size | 11 MB | 54 MB |
| Age rating | 4+ | 12+ |
| Developer | Johannes Klumpe | MERVE CAFEROGLU |
In-app purchases
Variables
No in-app purchases
Evthi
No in-app purchases









