Comparison

Cerne vs Dotchii

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

Head to head
About

Cerne

Measure and understand your carbon footprint by identifying trees with augmented reality. Track your personal impact and contribute to a collaborative map of CO₂ capture, helping to support environmental research and reforestation.

Highlights
  • Augmented reality tree identification
  • Carbon sequestration calculation
  • Collaborative community mapping
  • Individual and collective impact tracking
  • Biodiversity and flora information
  • CO₂ neutralized and oxygen generated reports
Features
Read full description

Cerne is an app that connects technology and nature to help you measure, understand, and reduce your carbon footprint. With the power of iPhone augmented reality, you can identify tree species, measure trunk diameter and height, and discover how much CO₂ each tree can capture. Key Features • Carbon sequestration calculation: Use the camera to record trees and instantly see their potential for CO₂ capture. • Smart mapping: Every entry is saved on a large collaborative map that shows the real impact of each tree and the community. • Individual and collective data: Track your personal contribution and see the combined results of all users in real time. • Biodiversity revealed: Learn about the species present in your region and help expand knowledge about local flora. • Impact reports: Get clear statistics on CO₂ neutralized and estimated oxygen generated from the trees you register. How It Works 1. Capture and identify – Photograph the tree, identify its species, and record diameter and height using the camera and augmented reality. 2. Calculate and track – Cerne estimates carbon sequestration potential and oxygen release, creating a history of your positive impact. 3. Share and engage – Invite friends and watch the community’s strength grow, with data revealing the total carbon removed from the air. Why Use Cerne Every tree counts for the climate. By registering your discoveries, you contribute to a global database that supports environmental research, encourages reforestation actions, and promotes a more sustainable lifestyle. The app helps you visualize the real impact of small actions, turning every record into valuable information for the planet. Download Cerne and join a community that believes technology and nature can work together to reduce CO₂ and improve the air we breathe.

About

Dotchii

Features
Read full description

Dotchii helps you run focused training sessions and keep a clear history for every pet. Use a precise session timer, log what you practiced, tag tricks and skills, and review your timeline at a glance. Your training notes stay with you on iPhone and sync privately across your devices with iCloud—so staying consistent with your dog’s training is simpler. Helpful Dotchii features for pet parents and trainers: Session chronometer with start, pause, and restart for accurate training time Training log with editable duration, date, and the pet the session belongs to Tag tricks and skills on each session so you can see patterns over time Optional notes to capture context, wins, and what to improve next Beautiful training history timeline per pet—duration, tags, and notes in one place Switch between pets and keep each profile’s sessions organized iCloud sync so your logs follow you to your other devices (private database) Live Activities support to keep session timing glanceable while you train Designed with accessibility in mind, including VoiceOver-friendly controls A calm, focused training flow—no extra hardware required Some features may require Dotchii Premium (free trial available where offered). HOW DOTCHII SUPPORTS YOUR TRAINING Time every session Start the chronometer when training begins, pause when you need a break, and restart with confidence. When you’re done, save the duration and move straight into logging—so every minute you spend training is reflected in your history. Capture the full picture On the log screen, adjust duration if needed, pick the right pet, set the session date, attach multiple tags for tricks or exercises, and add observations. One place to record what happened and why it mattered. See progress over time Your training history shows past sessions in a clear timeline: when you trained, how long you spent, which tags you used, and your notes. Spot streaks, revisit successful sessions, and plan the next step with confidence. Train anywhere, sync everywhere Dotchii uses your personal iCloud to sync training data across devices signed in with the same Apple ID. Practice at home, review on another device—your timeline stays up to date. Stay in the flow Live Activities help you keep session timing visible without digging back into the app mid-session—so you can focus on your dog, not the clock. EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.pepocoding.dev/privacy-policies/dotchii

Screenshots

Cerne4 screens
Dotchii4 screens

Verdict

The call

The clearest difference is in-app purchases: Cerne at none against Dotchii's 2. Dotchii's advantage is update cadence (daily vs every 4 days) and iOS requirement (17.0 vs 26.0). On price, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Dotchii sells 2 in-app purchases, starting at $9.99 per month. Cerne asks for nothing beyond the download.

UpkeepUpdate frequency

Cerne ships an update every 4 days, Dotchii daily. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 6 level
Cerne versus Dotchii: the parameters behind the verdict, then further details
ParameterCerneDotchii
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 4 daysDaily — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhoneiPhone
Requires iOS26.017.0 — better
Further details — not scored
Size12 MB23 MB
Age rating4+4+
DeveloperAndrei RechPedro Henrique Sudario da Silva

In-app purchases

None

Cerne

No in-app purchases

2 purchases

Dotchii

Subscriptions2
  • Monthly Subscription$9.991 Month
  • Annual Subscription$79.991 Year

Questions

Is Cerne free?
Cerne is free to download, with no in-app purchases.
Is Dotchii free?
Dotchii is free to download, with in-app purchases available.
Do Cerne or Dotchii have ads?
Neither Cerne nor Dotchii shows ads.
Which is updated more often, Cerne or Dotchii?
Cerne ships an update every 4 days, and Dotchii daily. Most recently, Cerne was updated on October 30, 2026 and Dotchii on October 31, 2026.

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