Comparison

ThenCommit vs GuineaDay

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

Head to head
About

ThenCommit

This app focuses on identity transformation through a single, sustained commitment. It offers a progressive interface that reveals features as you practice, encouraging deep change over superficial tracking. Enjoy a distraction-free experience designed for personal growth.

Highlights
  • Single commitment focus
  • Progressive interface
  • Press-and-hold commitment ritual
  • Calendar visualization
  • No streak shame
  • Data sovereignty
Read full description

Stop tracking. Start becoming. You've tried the habit trackers. The streak counters. The dashboard full of graphs that made you feel productive for exactly three weeks before the guilt set in. When participants had one goal, making if-then plans boosted completion; with six goals, the planning benefit disappeared. Habits reach automaticity in ~66 days on average (range 18–254). ThenCommit isn't another tracker. It's a commitment transformation system built on a simple truth: identity change happens through constraint, not choice. One commitment. Six months. Actual transformation. --- How ThenCommit Works Choose one meaningful commitment. Not five. Not three. One. For the next six months, this single practice becomes your focus. No distractions. No feature overload. No optimization theater. Your daily ritual is simple: press and hold to commit. Watch your practice deepen. Feel the shift from "something I do" to "who I am." --- Progressive Minimalism: Earn Complexity Through Practice Week 1: Pure focus. Just you and your commitment. Week 2: Your calendar unlocks, revealing your practice pattern. Month 1: Deeper tools emerge as your commitment takes root. Month 2: Master features appear when you're ready. Every feature is earned through consistency, not purchased. The app grows with your practice, never overwhelming, always supporting. --- Why Constraint Creates Freedom • No streak shame: Missing a day doesn't break anything. Your journey continues. • Reflection periods: Built-in cooldowns prevent impulse switching. • Identity-first design: Track transformation, not numbers. • Privacy by design: Your practice lives on your device. No accounts required. --- Perfect For: • Reformed optimizers exhausted by productivity culture • Intentional minimalists seeking depth over breadth • Anyone ready to stop collecting habits and start building identity --- Features That Matter: • Progressive interface that reveals as you grow • Beautiful calendar visualization • Press-and-hold commitment ritual with haptic feedback • Weekly milestone celebrations • Complete data sovereignty --- Start Your Transformation Your first 90 days establish the foundation of your new identity. No complex onboarding. No overwhelming choices. Just one question: What one commitment, practiced daily for six months, would transform who you are? Begin today. Because becoming who follows through starts with following through once. --- Premium Features Available For those seeking enhanced capabilities, premium permissions unlock archive functionality and advanced features while maintaining the core progressive experience. --- Legal Privacy Policy: houseofthen.com/pages/thencommit-privacy-policy Terms of Use (EULA): houseofthen.com/pages/thencommit-terms-and-conditions

About

GuineaDay

Features
Read full description

GuineaDay is the all-in-one care companion for guinea pig owners. Whether you have one piggy or a whole herd, GuineaDay helps you stay on top of feeding schedules, health tracking, and precious memories — all in one place. Task Management Create tasks for feeding, cleaning, health checks, and more. Set due dates, priorities, and recurring schedules so nothing slips through the cracks. Enable reminders and GuineaDay will notify you right on time. Piggy Profiles Give every guinea pig their own profile with a name, birthday, breed, and photo. Track their weight over time with a built-in log and chart to spot trends and keep them healthy. Photo Gallery Capture and store your favourite moments. Build a dedicated photo album for your guinea pig family that you can look back on anytime. Household Sharing (International) Share your piggies with a partner or family member. Invite them with a household code and stay in sync — tasks, profiles, photos, and weight logs all update in real time across devices. Mainland China Support GuineaDay works fully offline for users in Mainland China. All data is stored securely on your device — no internet connection required. Bilingual GuineaDay supports both English and Simplified Chinese. Switch languages anytime in Settings.

Screenshots

ThenCommit4 screens
GuineaDay4 screens

Verdict

The call

The clearest difference is in-app purchases: GuineaDay at none against ThenCommit's 8. On price, update cadence, 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. ThenCommit sells 8 in-app purchases, starting at $5.00 per month. GuineaDay asks for nothing beyond the download.

UpkeepUpdate frequency

ThenCommit ships an update every 2 weeks, GuineaDay weekly. The most recent releases landed on October 11, 2026 and October 9, 2026 respectively.

Scorecard1 real difference · 9 level
ThenCommit versus GuineaDay: the parameters behind the verdict, then further details
ParameterThenCommitGuineaDay
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 2 weeksWeekly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhoneiPhone
Requires iOS17 — better18.0
Further details — not scored
Size43 MB15 MB
Age rating4+4+
DeveloperThen LLCZHE WANG

In-app purchases

8 purchases

ThenCommit

Subscriptions5
  • ThenCommit+$5.001 Month
  • ThenCommit+ Monthly$8.001 Month
  • ThenBecome: The Life-changing Suite$15.001 Month
Show 2 more
  • ThenCommit+ Annual$50.001 Year
  • ThenBecome: The Life-changing Suite$150.001 Year
One-time3
  • ThenCommit+ Early Adopter$20.00
  • ThenCommit+ Founder$100.00
  • ThenBecome: Who You Choose to Be$200.00
None

GuineaDay

No in-app purchases

Questions

Is ThenCommit free?
ThenCommit is free to download, with in-app purchases available.
Is GuineaDay free?
GuineaDay is free to download, with no in-app purchases.
Do ThenCommit or GuineaDay have ads?
Neither ThenCommit nor GuineaDay shows ads.
Which is updated more often, ThenCommit or GuineaDay?
ThenCommit ships an update every 2 weeks, and GuineaDay weekly. Most recently, ThenCommit was updated on October 11, 2026 and GuineaDay on October 9, 2026.

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