Tandem vs Marlow Diary
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Tandem
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Tandem is a shared organizer built for couples. Plan life together with shared to-dos, a shared calendar, and transparent expense tracking. Tandem helps couples stay organized, split responsibilities, and manage everyday life in one place. SHARED TO-DOs Create shared task lists, assign to-dos, and track whatβs done. From groceries to weekend plans, everyone knows what needs doing. SHARED CALENDAR Plan events together with a shared calendar. See whoβs involved, create a couple of events, and keep personal and shared schedules perfectly aligned. SHARED FINANCES Track expenses, see spending by person, and understand where your money goes. Transparent, simple, and made for two. Built for couples Tandem is designed around partnership: β’ Shared and personal views β’ Clear ownership of tasks and expenses β’ Clean design that stays out of the way Private & secure Your data belongs to you and your partner. Everything is securely stored and only shared between the two of you. Whether youβre planning your week, managing finances, or organising life together, Tandem keeps everything in sync β so you can focus on what matters. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Marlow Diary
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Marlow is a shared baby-care diary for sitters, helpers, and invited parents. Log the day in a few taps: - Sleep and naps - Bottles and feeds - Diapers - Mood - Medicine - Notes, allergies, and routines Sitters can add babies, organize rooms when needed, invite helpers, and keep each child's care notes in one place. Parents get a read-only view of their baby's day, including the current status, recent activity, allergies, care notes, and patterns over time. Marlow is built for independent sitters, nanny shares, and small care groups that want organized parent updates without a heavy daycare management system. Parents join only by invite. Children do not create accounts. Subscriptions are paid by the care diary owner through Apple in-app purchase; parents and helpers use Marlow for free. Terms of Use: https://marlow.care/terms
Screenshots
Verdict
The clearest difference is update cadence: Marlow Diary at every 4 days against Tandem's every 8 days. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Tandem sells 3 in-app purchases, starting at $5.99 per month and Marlow Diary sells 4 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.
Tandem ships an update every 8 days, Marlow Diary every 4 days. The most recent releases landed on October 16, 2026 and October 4, 2026 respectively.
| Parameter | Tandem | Marlow Diary |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 8 days | Every 4 days β better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, iPod β better | iPhone, iPod |
| Requires iOS | 15.1 | 15.1 |
| Further details β not scored | ||
| Size | 55 MB | 50 MB |
| Age rating | 4+ | 4+ |
| Developer | Bruno Petkovic | Joseph Coleman |
In-app purchases
Tandem
- Tandem Premium7 Days trial$5.991 Month
- Tandem Premium7 Days trial$29.991 Year
- Tandem Premium Lifetime$79.99
Marlow Diary
- Small Care14 Days trial$7.991 Month
- Growing Care$19.991 Month
- Small Care14 Days trial$79.991 Year
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- Growing Care$189.991 Year









