Simple_Clock vs Engine Builder Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Simple_Clock
A minimalist analog clock designed with a classic Apple iPad aesthetic. It offers the unique ability to integrate calendar events and reminders as clock hands for enhanced time management.
- Classic Apple iPad style analog clock
- Optional calendar integration as clock needles
- Optional reminders integration as clock needles
- Minimalist design
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Classic Apple iPad style clock. Feature • Add Calendar and Reminders as clock needles (optional) Support: vibecoder.company@gmail.com
Engine Builder Pro
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Engine Builder Pro brings engine build records and practical workshop calculators together in one place. Create detailed customer build sheets, store measurements and component specifications, attach build photos, generate PDF reports and keep portable backups. Calculators can use values from the current job, reducing repeated entry and helping keep calculations connected to the build being assembled. Workshop tools include: • Static and dynamic compression calculations • Target compression and engine stack-up solving • Piston-to-valve clearance visualisation • Cam degree and valve-train setup tools • Carburettor sizing with camshaft inputs • Ring-gap, rod-ratio, head-porting and measurement calculators • Job-linked build checks and missing-input guidance • PDF build sheets, photos and portable backups Cam-card details are entered manually, keeping the recorded figures under the builder's direct control. Engine Builder Pro is intended as a recordkeeping and calculation aid for knowledgeable engine builders. Users remain responsible for checking measurements, inputs, component instructions and final assembly decisions.
Screenshots
Verdict
The clearest difference is in-app purchases: Engine Builder Pro at none against Simple_Clock's 1. Engine Builder Pro also leads on ads (none vs shown) and update cadence (every 2 days vs weekly). On price 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. Simple_Clock sells 1 one-off in-app purchase. Engine Builder Pro asks for nothing beyond the download.
Simple_Clock ships an update weekly, Engine Builder Pro every 2 days. The most recent releases landed on October 30, 2026 and October 5, 2026 respectively.
| Parameter | Simple_Clock | Engine Builder Pro |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (146 ratings) — better | — |
| Positive reviews | 70.6% of reviews | — |
| Number of ratings | 146 — better | — |
| Update frequency | Weekly | Every 2 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 91 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | Seung-Un Ham | Gemma Beames |
In-app purchases
Simple_Clock
- Remove Ads (Lifetime)$4.99
Engine Builder Pro
No in-app purchases
Questions
Is Simple_Clock free?
Is Engine Builder Pro free?
Do Simple_Clock or Engine Builder Pro have ads?
Which is updated more often, Simple_Clock or Engine Builder Pro?
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