Comparison

ESF Mobile vs Relationship tracker

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

ESF Mobile

Features
Read full description

ESF Mobile makes it easy to manage the UC Merced Experimental Smart Farm by bringing field data and imagery straight to your phone. View farm maps with crop boundaries, explore satellite and drone imagery over time, and track crop health with simple visualization tools. The app helps you stay organized with crop types, field details, giving you a clear picture of what’s happening across the farm in one place.

About

Relationship tracker

This app provides a private space for couples to track their relationship journey. It offers features like a live dating counter, a shared timeline for memories and milestones, and widgets to display relationship progress. It's designed to help couples celebrate their connection, whether they are new, long-distance, or married.

Highlights
  • Live dating counter
  • Shared moments timeline
  • Memory mapping
  • Private couple space
  • Home screen widgets
  • Distance tracking for LDRs
Features
Read full description

Duo is a private couple space and relationship tracker designed for two people. Start solo and invite your partner anytime with a simple invite code. Whether you’re a new couple building memories, in love and tracking your relationship, in a long-distance relationship, or already married, Duo helps couples track their relationship and celebrate their journey together.
 Why couples use Duo - See how long you’ve been together with a live dating counter and love counter - Track your relationship with a simple relationship tracker and dating tracker - Save special memories, milestones, and love notes in your couple timeline - Use widgets to see your relationship progress directly on your screen - Keep a private space built just for you and your partner Duo makes it easy to remember the little things and celebrate the big ones. Features Time Together Counter See exactly how long you’ve been together from your chosen start date. Display your relationship time in years, months, days, hours, or minutes. Perfect for anniversaries, milestones, and everyday reminders of your relationship. Moments Timeline Save memories, events, and milestones in a shared relationship timeline. Capture both past memories and upcoming events so you can revisit your story anytime. Rich Moment Details Add photos, notes, dates, and locations to your moments. Search and filter memories easily to rediscover important parts of your relationship. Map + Distance See distance and shared location context when you both enable location sharing. Great for long-distance couples who want to feel more connected. Memory Map Explore your shared memories visually on a map and see where important moments happened. Private Duo Space Create or join a couple using a secure invite code. Your shared relationship space stays private between you and your partner. Widgets (Duo Pro) Add beautiful widgets to your Home Screen or Lock Screen. Widgets make it easy to keep your relationship visible throughout the day. Built for real relationships Whether you’re a new happy couple building memories, in love and looking for something to track, in a long-distance relationship, or a perfect match or married, Duo helps couples track their relationship and celebrate their journey together. Start your shared timeline today. Download Duo and begin building your relationship story together. ============= Terms of Service: https://keinois.com/duo/terms-of-service Privacy Policy: https://keinois.com/duo/privacy-policy

Screenshots

ESF Mobile4 screens
Relationship tracker4 screens

Verdict

The call

The clearest difference is in-app purchases: ESF Mobile at none against Relationship tracker's 6. ESF Mobile also leads on device support (3 vs 1) and iOS requirement (13.0 vs 18.0). On price, update cadence and ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Relationship tracker sells 6 in-app purchases, starting at $0.99 per 7 days. ESF Mobile asks for nothing beyond the download.

UpkeepUpdate frequency

ESF Mobile ships an update fortnightly, Relationship tracker every 2 weeks. The most recent releases landed on October 11, 2026 and October 8, 2026 respectively.

Scorecard3 real differences · 6 level
ESF Mobile versus Relationship tracker: the parameters behind the verdict, then further details
ParameterESF MobileRelationship tracker
PriceFreeFree
Rating—4.6 (11 ratings) — better
Number of ratings—11 — better
Update frequencyFortnightlyEvery 2 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13.0 — better18.0
Further details — not scored
Size82 MB39 MB
Age rating4+4+
DeveloperUC MercedLyndavan Doan

In-app purchases

None

ESF Mobile

No in-app purchases

6 purchases

Relationship tracker

Subscriptions4
  • Duo Pro (Week)$0.997 Days
  • Duo Pro (Week)3 Days trial$2.997 Days
  • Duo Pro (Annual)$8.991 Year
Show 1 more
  • Duo Pro (Annual)$17.991 Year
One-time2
  • Duo Pro (Lifetime)$14.99
  • Duo Pro (Lifetime)$29.99

Questions

Is ESF Mobile free?
ESF Mobile is free to download, with no in-app purchases.
Is Relationship tracker free?
Relationship tracker is free to download, with in-app purchases available.
Do ESF Mobile or Relationship tracker have ads?
Neither ESF Mobile nor Relationship tracker shows ads.
Which is updated more often, ESF Mobile or Relationship tracker?
ESF Mobile ships an update fortnightly, and Relationship tracker every 2 weeks. Most recently, ESF Mobile was updated on October 11, 2026 and Relationship tracker on October 8, 2026.

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