Duee vs Session Flow
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Duee
Organize all your recurring bills and subscriptions in a visual calendar. Get smart reminders before payments are due and track your expenses easily. Avoid missed payments with this simple, intuitive tool.
- Payment calendar with month view
- Recurring payment tracking
- Smart due date reminders
- Mark payments as paid/unpaid
- Notes for payment details
- Monthly and yearly totals
- Multi-currency support
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Track bills, subscriptions, rent, and recurring payments in one simple calendar so you always know what is due next. Duee helps you organize your monthly payments in a clean, visual way. See upcoming bills by date, understand how heavy each day looks, and stay ahead with reminders before something gets missed. Features: • Payment calendar with a clear month view • Recurring payments: weekly, monthly, yearly, and installments • Smart reminders for upcoming due dates • Mark payments as paid or unpaid • Notes for payment details and personal info • Monthly and yearly totals at a glance • Multi-currency support • Clean icons for apps, services, and utilities • Premium options for advanced reminders and unlimited tracking Use Duee for subscriptions, rent, utilities, memberships, insurance, phone bills, internet, and other recurring expenses. Simple to use. Easy to scan. Built to help you avoid missed payments.
Session Flow
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Session Flow is the calendar for anyone who works by appointment and wants to know, without mental math, who has paid and what's left to collect. It works for therapists and counselors, dietitians, physical therapists, private tutors, personal trainers, hair stylists, nail techs and anyone paid per visit. Add a client once, with the day, the time and the fee, and your schedule fills itself in. Every session shows its fee and whether it's been paid. Your schedule fills itself in • Weekly, every other week, monthly or your own repeat, with a set number of sessions if you need one. • Mark holidays and your time off, and the app cancels those sessions; change your mind and they come back. A client who travels gets a pause of their own. • No-shows, cancellations and rescheduling in one tap, with no math to redo. • Day, week and month views, with a warning when two times overlap. • Already use your phone's calendar? The app reads your appointments and sets up each client with you, one by one. Nothing in your calendar changes. Payments in one place • One tap on Mark as paid and the session is paid. • Per session or per month, a flat fee or the sum of the sessions: each client on their own terms. • A rate increase applies from its date on, and older open sessions keep the old rate. • Outstanding: the total and client by client, always up to date. • Prepayments become a balance, and each session draws from it (Premium). Reminders and payment messages on WhatsApp • The session reminder, with the day and time, is ready to send, and the day's list shows who still needs one. • The payment message is ready too, with the date of each open session and the total (Premium). You check it and send it. • Charge one by one: each client's payment message, one after the other (Premium). • Notifications on your phone before each session. Receipts and documents • Receipts, attendance letters and a superbill template, as PDFs with your details and your client's. • Ready-made templates, and your own. • A spreadsheet of payments received, for your accountant. Your month in numbers • Received, forecast and what's left, month by month. • Average ticket, % canceled and the month's chart (Essential and Premium). • On a tablet or computer, Insights: your year month by month and what needs attention this week (Premium). Your data stays with you • Works without an account and offline. Without the cloud, nothing leaves your phone. • No tracking. • Back up to a file whenever you want. • With the cloud (Premium), the same data on your phone, tablet and browser. • For health professionals: Session Flow is not a clinical record, and it keeps only what your schedule and payments need. Your work, your words • Call the people you see clients, patients or students, and each visit a session, appointment, consultation or class. • Groups, with each participant's fee and payments (Premium). • English, Portuguese and Spanish, with your currency and 12- or 24-hour time. Plans • Up to 4 clients, with no subscription and no time limit. • Essential: up to 40 clients and full statistics. • Premium: up to 1,000 clients, cloud sync, WhatsApp payment messages, groups, prepayments and Insights. • Essential and Premium come with a 14-day trial on your first subscription. Cloud Terms of Use: https://getsessionflow.app/en/terms/ Privacy Policy: https://getsessionflow.app/en/privacy/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Keywords appointment scheduling,appointment scheduler,client scheduling,payment tracking,client management,recurring sessions,psychologist,therapist,coach,personal trainer
Screenshots
Verdict
The clearest difference is update cadence: Session Flow at every 3 days against Duee's fortnightly. On price, 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
Both are free to download. Duee sells 3 one-off in-app purchases and Session Flow sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.
Duee ships an update fortnightly, Session Flow every 3 days. Both last shipped on October 24, 2026.
| Parameter | Duee | Session Flow |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (4 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Fortnightly | Every 3 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 16.4 | 16.0 — better |
| Further details — not scored | ||
| Size | 60 MB | 52 MB |
| Age rating | 4+ | 4+ |
| Developer | Yigit ERKAL | Kaio Rafael de Oliveira Diniz |
In-app purchases
Duee
- Monthly$1.99
- Yearly$9.99
- Remove Notification Limit$19.99
Session Flow
- Essential14 Days trial$1.991 Month
- Session Flow Premium Monthly14 Days trial$7.991 Month
- Session Flow Premium Yearly14 Days trial$59.991 Year









