Comparison

S.D Timer vs CurdClock

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

Head to head
About

S.D Timer

Features
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S.D TIMER computes the exact feeding schedule for your sourdough starter, working backward from your target ready time to give you a precise feed time and gram-level recipe. HOW IT WORKS Enter six parameters: target ready time, quantity of starter needed (grams), desired hydration percentage, flour type, starter activity level (%), and ambient temperature (ยฐC or ยฐF). The app applies a fermentation kinetics model that factors temperature-dependent metabolic rates of lactic acid bacteria and wild yeast to calculate when your starter will hit peak activity. OUTPUT โ€” YOUR FEEDING PLAN โ€ข Feed time: the exact moment to feed so your starter peaks on schedule โ€ข Starter / flour / water quantities in grams โ€ข Feed ratio (e.g., 1:9.8:9.8) โ€ข Estimated peak pH โ€ข Predicted flavor profile (mild, balanced, tangy, complex) โ€ข Recommended bread types suited to the resulting starter profile โ€ข Fermentation timeline chart with 80% activity window marked Set process alarms directly from the results screen to get notified at feed time and at peak. DESIGNED FOR PRECISION Temperature has a nonlinear effect on fermentation speed. A 5ยฐC difference between summer and winter kitchens can shift peak time by 2โ€“4 hours. S.D TIMER accounts for this so your timing stays consistent regardless of ambient conditions. Supports both Celsius and Fahrenheit. Works across all flour types including whole wheat, rye, spelt, and einkorn. Starter activity input lets you calibrate for your specific culture's behavior. PROFESSIONAL & HOME BAKERS Built for bakers who want repeatability and data-driven control over their sourdough process. Used by professional bakery instructors for workshop demonstrations and planning. No login required. Works offline once loaded. FREE VERSION This is the free edition of S.D TIMER, supported by banner ads. For an ad-free experience, upgrade to S.D TIMER Pro.

About

CurdClock

Features
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Cheesemaking is all about timing โ€” and one wrong cut ruins the whole batch. CurdClock is a step-by-step timing and calculation tool for home cheesemakers. Enter your flocculation time, select your cheese type, and get the exact moment to cut your curd. No mental math. No guesswork. No wasted milk. HOW IT WORKS 1. Add rennet to your milk and start the flocculation timer 2. Enter the observed floc time โ€” CurdClock calculates your exact cut time 3. Follow the step-by-step batch timer through pressing, salting, and aging FLOCCULATION CALCULATOR The flocculation method is the most reliable way to time your curd cut โ€” but it requires multiplying your observed time by a cheese-specific factor (2.0โ€“6.0). CurdClock handles this instantly. Select your cheese type, enter the floc time, and a countdown begins to your exact cut moment. RENNET DOSE CALCULATOR Enter your milk volume, rennet type (single strength, double strength, or tablet), and milk type (raw or pasteurized). CurdClock returns the precise dose in teaspoons and milliliters, plus the correct dilution water amount. STEP-BY-STEP BATCH TIMER Follow 12+ timed steps per recipe โ€” from heating milk through pressing. Change your start time and every step recalculates automatically. The same feature home cheesemakers have been building spreadsheets for. (Pro) AGING TRACKER Track multiple cheeses aging simultaneously. Color-coded status shows what needs attention today: green for on schedule, yellow for action due, red for overdue. Never forget to flip your Gouda or wash your Brie. (Pro) PRO FEATURES โ€” $4.99/month - 15+ cheese recipes (Gouda, Feta, Brie, Parmesan, Havarti, and more) - Unlimited batch log history - Unlimited aging tracker - Flip and wash reminders (push notifications) - Batch notes - Custom recipe builder FREE FEATURES - Flocculation calculator (unlimited) - Rennet dose calculator (unlimited) - 3 built-in recipes: Farmhouse Cheddar, Quick Mozzarella, Whole Milk Ricotta - Batch timer (1 active batch) - Batch log (last 5 batches) - Aging tracker (1 cheese) PRIVACY FIRST No account required. No internet connection needed. All batch logs, aging records, and preferences are stored locally on your device only. Nothing is sent to any server. DISCLAIMER CurdClock provides timing guides based on general cheesemaking principles. Always follow your specific recipe instructions and verify curd readiness by physical inspection (clean break test). Results vary based on milk source, rennet brand, temperature, and conditions. This app is not a substitute for recipe instructions or professional cheesemaking guidance. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

S.D Timer4 screens
CurdClock3 screens

Verdict

The call

The clearest difference is in-app purchases: S.D Timer at none against CurdClock's 1. CurdClock's advantage is ads (none vs shown) and iOS requirement (13.0 vs 15.0). On price and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. CurdClock sells 1 in-app purchase, starting at $4.99 per month. S.D Timer asks for nothing beyond the download.

Scorecard3 real differences ยท 2 level
S.D Timer versus CurdClock: the parameters behind the verdict, then further details
ParameterS.D TimerCurdClock
PriceFreeFree
AdsYesNo โ€” better
In-app purchasesNo โ€” betterYes
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.013.0 โ€” better
Further details โ€” not scored
Size4 MB29 MB
Age rating17+4+
Developeroran kamelgarnJUHWAN PARK

In-app purchases

None

S.D Timer

No in-app purchases

1 purchases

CurdClock

Subscriptions1
  • CurdClock Pro7 Days trial$4.991 Month

Questions

Is S.D Timer free?
S.D Timer is free to download, with no in-app purchases.
Is CurdClock free?
CurdClock is free to download, with in-app purchases available.
Do S.D Timer or CurdClock have ads?
S.D Timer shows ads; CurdClock does not.

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