Comparison

Fertility Window Planner vs FastingForge

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

Head to head
About

Fertility Window Planner

This app helps you identify your fertile window for conception through private data logging and transparent prediction engines. It visualizes your cycle data, including basal body temperature and cervical mucus, to show your most fertile days and predicted ovulation. Core features are free, with an optional subscription for advanced insights and history.

Highlights
  • Log basal body temperature, cervical mucus, and test results
  • Visualize fertile window and predicted ovulation day
  • Transparent prediction engine with chart explanations
  • Private data storage with export and delete options
  • Optional subscription for full cycle history and insights
Features
Read full description

Fertility Window Planner is the calm, private way to find your fertile window while trying to conceive. No ads, no data selling, no AI chatbot — just your own signs, read by a transparent engine that shows its work. LOG YOUR SIGNS IN SECONDS Record basal body temperature (°F or °C), cervical mucus, ovulation-test results, flow, intercourse and symptoms — one tap per day, editable any time. SEE YOUR FERTILE WINDOW The Dawn Arc and a phase-tinted calendar show the six days you're most likely to conceive, your predicted ovulation day, and your next period — each with an honest confidence tier. UNDERSTAND THE 'WHY' A BBT chart draws your temperature curve with the computed coverline, the shaded fertile window and your mucus/OPK markers — so you can see exactly how each prediction was made. Nothing leaves your device to compute it. BUILT FOR PRIVACY Your data is yours: protected by per-account security, never sold, no third-party trackers. Export or delete everything any time. PRO (optional subscription) Unlock full cycle history, cross-cycle chart overlay, personal pattern insights and saved summaries. Core logging and your current fertile-window prediction are always free. - Monthly $6.99 or Annual $39.99, with a 7-day free trial - Payment is charged to your Apple ID at confirmation; auto-renews unless canceled at least 24 hours before the period ends; manage or cancel in Settings Fertility Window Planner is for general wellness and body literacy. It is not medical advice, a diagnosis, or a contraceptive method, and never labels days 'safe' or 'unsafe.' Talk to a healthcare provider about conceiving or any concern. Privacy Policy: https://preview.apppublishing.ai/legal/540/privacy Terms of Use (EULA): https://preview.apppublishing.ai/legal/540/terms

About

FastingForge

This app offers an offline intermittent fasting timer with a visual dial that shows your body's typical stage during a fast. It provides science-backed information on each milestone and works without an internet connection.

Highlights
  • Offline fasting timer
  • Visual Tempering Ring stage indicator
  • Science-backed milestone explanations
  • Multiple fasting protocols
  • Fasting history and streaks
  • Achievements and reminders
Features
Read full description

FastingForge is a calm, offline intermittent fasting timer. One tap starts your fast — then the Tempering Ring shows which science-backed stage your body is typically in, and how long until the next one. THE TEMPERING RING A live dial that heats from cold slate to molten gold as your fast runs. Each milestone — blood sugar settling, glycogen depletion, fat burning, ketosis, autophagy — ignites as its hour is reached, with a plain-language note on what is happening. HONEST ABOUT THE SCIENCE Every stage carries an evidence badge: well established, individually varies, or animal-model. FastingForge estimates from the clock; it never claims to measure your body. It is a general wellness and educational tool, not medical advice. WORKS WITHOUT A SIGNAL The timer, the milestones, your history and your reminders all run on your device. No account needed, no feed, no articles, no upsells mid-fast. EVERYTHING THAT MATTERS IS FREE The timer and the Tempering Ring, every protocol (13:11 through 20:4, OMAD, custom and extended), your full fasting history, streaks and stats, the complete stages library, this month's calendar, achievements and offline reminders — free, forever. FORGE PRO (optional subscription) - Weekday consistency analytics and the full trend breakdown - Weight logging, plus an honest read on how your weekly fasting hours line up with your weekly weight change - Full-history calendar and shareable milestone cards - 7.99 USD per month or 49.99 USD per year, with a 7-day free trial for eligible new subscribers - Payment is charged to your Apple ID at confirmation. Subscriptions auto-renew unless canceled at least 24 hours before the end of the current period; manage or cancel anytime in your Apple ID settings. Fasting is not right for everyone. Talk to a doctor before fasting if you are pregnant or breastfeeding, under 18, diabetic, taking medication, or have a history of disordered eating. Privacy Policy: https://ayeyyukuqz.accountnotify.app/privacy Terms of Use (EULA): https://ayeyyukuqz.accountnotify.app/terms

Screenshots

Fertility Window Planner4 screens
FastingForge4 screens

Verdict

The call

The clearest difference is rating: FastingForge at 5.0 against Fertility Window Planner's 4.0. FastingForge also leads on ratings volume (3 vs 1). On price, review sentiment, ads and in-app purchases 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. Fertility Window Planner sells 3 in-app purchases, starting at $6.99 per month and FastingForge sells 2 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

FastingForge holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 3 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Scorecard2 real differences · 8 level
Fertility Window Planner versus FastingForge: the parameters behind the verdict, then further details
ParameterFertility Window PlannerFastingForge
PriceFreeFree
Rating4.0 (1 ratings)5.0 (3 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings13 — better
Update frequencyEvery 9 days—
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFreemium
DevicesiPhone, iPodiPhone, iPod
Requires iOS15.115.1
Further details — not scored
Size37 MB43 MB
Age rating4+4+
DeveloperASHOK KUMARNorthgate Apps, LLC

Customer experience

Fertility Window Planner

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

FastingForge

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

Fertility Window Planner

Subscriptions3
  • Fertility Planner Pro Monthly7 Days trial$6.991 Month
  • Fertility Planner Pro Annual7 Days trial$39.991 Year
  • Fertility Window Planner$39.991 Year
2 purchases

FastingForge

Subscriptions2
  • Forge Pro Monthly7 Days trial$7.991 Month
  • Forge Pro Annual7 Days trial$49.991 Year

Questions

Is Fertility Window Planner free?
Fertility Window Planner is free to download, with in-app purchases available.
Is FastingForge free?
FastingForge is free to download, with in-app purchases available.
Which has better reviews, Fertility Window Planner or FastingForge?
FastingForge is rated higher. Fertility Window Planner averages 4.0 out of 5 from 1 ratings, while FastingForge averages 5.0 from 3 ratings.
Do Fertility Window Planner or FastingForge have ads?
Neither Fertility Window Planner nor FastingForge shows ads.

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