iSwear Jar vs Prep Clock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iSwear Jar
This app helps you break bad habits and build good ones using a Ulysses Pact. You set monetary penalties for slip-ups, encouraging accountability and change. Celebrate successes with virtual gold stars.
- Habit creation and destruction
- Monetary penalty system
- Ulysses Pact technique
- Accountability on the go
- Complete privacy
- Success celebration with gold stars
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The iSwear Jar gives you the power to create or destroy any habit. Simply imagine a dollar bill being sliced by the whirring blades of a paper shredder, turning cool cash into green slivers... Then imagine that dollar bill was yours, and that you surrendered it as a penalty for slipping up. This technique of using a freely made decision to bind oneself in the future is called a Ulysses Pact, and dates back to the Odyssey. It can be used to effect great change. This app gives you the opportunity to use this technique. Based on the honor system, you can make a voluntary in-app purchase for your slip ups and missed goals. Features include: - Accountability on the go - Complete privacy - Acknowledge your slip ups with a real monetary commitment - Celebrate your successes with an iconic gold star Download it today and start making big changes now!
Prep Clock
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Leave on time without guessing. Prep Clock starts with your arrival time, works backward through travel and preparation, and tells you exactly when to begin. PLAN THE WHOLE DEPARTURE - Build reusable routines from real prep steps. - Add destination, travel mode, buffer, and arrival time. - See start-prep, leave, and arrive times together. - Run tasks step by step with per-task timing. - Recalculate when traffic or the plan changes. - Use Running Late mode to see an honest updated arrival estimate. LEARN YOUR REAL TIMING - Record how long tasks actually take. - Compare planned and observed duration ranges. - Apply adaptive estimates to future plans. - Generate upcoming events from recurring prep plans. FREE - Up to three upcoming events and three custom routines. - Core backward planning and commute calculation. PREP CLOCK PRO - Unlimited events and routines. - Recurring plans and adaptive timing. - Manually import selected Calendar events and attach a prep routine. No background calendar sync. - Running Late mode and additional travel modes. - Home Screen widgets and Lock Screen Live Activities. Calendar, location, and notification permissions are requested only when the related feature needs them. Schedule, task, and location details are not sent to an AI service. Subscriptions renew automatically unless canceled in your Apple ID settings. Restore an existing purchase from Settings > Restore Purchases. TERMS OF USE Product Terms of Use: https://www.uncommonweather.com/legal/apps/prepclock-terms.html Apple Standard Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is update cadence: Prep Clock at every 5 days against iSwear Jar's every 3 weeks. iSwear Jar's advantage is iOS requirement (16.0 vs 18.0). 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. iSwear Jar sells 1 one-off in-app purchase and Prep Clock sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
iSwear Jar ships an update every 3 weeks, Prep Clock every 5 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.
| Parameter | iSwear Jar | Prep Clock |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 3 weeks | Every 5 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, Mac — better | iPhone, iPad |
| Requires iOS | 16.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 2 MB | 17 MB |
| Age rating | 12+ | 4+ |
| Developer | Alterscope Solutions LLC | Ryan Tinklepaugh |
In-app purchases
iSwear Jar
- Slip Up Penalty$0.99
Prep Clock
- Pro Monthly$2.991 Month
- Pro Annual$19.991 Year









