Comparison

Perfume Ratio vs Schlummer

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

Head to head
About

Perfume Ratio

Features
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Perfume Ratio is a precision calculator for crafting custom fragrances. Calculate exact amounts of fragrance oil, alcohol, and distilled water for any perfume concentration. Features: - 5 concentration types: EDC, EDT, EDP, Parfum, Extrait - Adjustable fragrance oil percentage with real-time calculation - Top, Middle, and Base note ratio sliders with presets - Add multiple fragrance oils with per-layer parts allocation - Batch scaling (ร—0.5 to ร—10) for small samples or large batches - Quick volume presets: 10ml, 30ml, 50ml, 100ml - Detailed formula breakdown with per-oil volumes - 100% offline, no ads, no account required

About

Schlummer

Features
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Schlummer is a sleep tracker app for iPhone that combines sleep-stage analysis, a gentle smart alarm, and on-device snore and sleep-talk recording in one app, plus 12 built-in sleep soundscapes. The smart alarm wakes you during light sleep inside your chosen window, and every night gets a readable sleep curve and a sleep score. Sleep analysis runs on your iPhone without an account, and your sleep data stays on your device. A banner and an occasional full-screen ad keep the free version going, and Schlummer Pro removes them. WAKE UP GENTLY, OR NOT AT ALL The smart alarm wakes you during light sleep inside your personal window so you start the day more rested. Snooze works even in gentle-wake mode. Pick your own alarm sound: three built-in tones, any song from your music library, or an audio file. It fades in gently rather than jolting you awake. And if you only want to see how you slept, switch the alarm off entirely and Schlummer simply measures your night. UNDERSTAND YOUR NIGHT A beautiful, readable sleep curve and a sleep score show how your night went at a glance. We treat the numbers as a wellness trend, not a medical measurement. HEAR WHAT YOU DO AT NIGHT Snoring and sleep-talk are recorded on-device only at loud moments. Play them back in the morning, tag a partner, and share as a video with a waveform. Rather not record anything? Switch it off: your sleep stages keep working and nothing is written to your iPhone. FALL ASLEEP CALMLY 12 on-device generated soundscapes (rain, ocean, wind and more) with a sleep timer. SEE EVERY NIGHT The Morning tab keeps your nights in one list with a score trend. The free version holds the last seven nights; Schlummer Pro keeps the whole archive and the long-term trend. HONEST, NOT GREEDY The smart alarm, your own alarm sound, snore recording, your sleep score and sharing a night as a video are free. Schlummer Pro adds your full night archive, the long-term trend, all 12 soundscapes and removes the ads: monthly, yearly, or a one-time Lifetime with no subscription. We never raise the price on features you already own. PRIVATE BY DESIGN No account is needed for sleep tracking. Your sleep data stays on your iPhone. Ads are delivered by Google AdMob and you are asked for consent first; Schlummer Pro removes them. Note: Schlummer is a wellness product, not a medical device. For a reliable alarm we recommend charging your iPhone overnight and keeping the ringer on. SUBSCRIPTION DETAILS Schlummer Pro is available as an auto-renewable subscription: Monthly (4.99 EUR per month) or Yearly (29.99 EUR per year, approx. 2.50 EUR per month, includes a 3-day free trial). A one-time Lifetime purchase (69.99 EUR) is also available and is not a subscription. Payment is charged to your Apple Account at confirmation of purchase. A subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. Your account is charged for renewal within 24 hours prior to the end of the current period. You can manage or cancel your subscription in your Apple Account settings after purchase. Any unused portion of a free trial is forfeited when you purchase a subscription. Privacy Policy: https://web-ten-rouge-90.vercel.app/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Where available, you can explore recommendations for our other apps. They load online; views and taps are counted as daily totals without personal profiles or user/device identifiers. Our privacy policy explains this feature and existing advertising.

Screenshots

Perfume Ratio1 screens
Schlummer4 screens

Verdict

The call

The clearest difference is ads: Perfume Ratio at none against Schlummer's shown. Perfume Ratio also leads on update cadence (every 5 days vs every 3 weeks). On price, in-app purchases, device support and iOS requirement 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. Perfume Ratio sells 3 one-off in-app purchases and Schlummer sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Perfume Ratio ships an update every 5 days, Schlummer every 3 weeks. Both last shipped on October 14, 2026.

Scorecard2 real differences ยท 4 level
Perfume Ratio versus Schlummer: the parameters behind the verdict, then further details
ParameterPerfume RatioSchlummer
PriceFreeFree
Update frequencyEvery 5 days โ€” betterEvery 3 weeks
AdsNo โ€” betterYes
In-app purchasesYesYes
DevicesiPhone, iPad โ€” betteriPhone
Requires iOS17.017.0
Further details โ€” not scored
Size1 MB6 MB
Age rating4+4+
Developerๅฎˆไฟก ๅฐšLevin David Schwab

In-app purchases

3 purchases

Perfume Ratio

One-time3
  • Small Tip$0.99
  • Medium Tip$2.99
  • Large Tip$4.99
3 purchases

Schlummer

Subscriptions2
  • Schlummer Pro Monthly3 Days trial$3.991 Month
  • Schlummer Pro Yearly3 Days trial$24.991 Year
One-time1
  • Schlummer Pro Lifetime$59.99

Questions

Is Perfume Ratio free?
Perfume Ratio is free to download, with in-app purchases available.
Is Schlummer free?
Schlummer is free to download, with in-app purchases available.
Do Perfume Ratio or Schlummer have ads?
Schlummer shows ads; Perfume Ratio does not.
Which is updated more often, Perfume Ratio or Schlummer?
Perfume Ratio ships an update every 5 days, and Schlummer every 3 weeks. Most recently, Perfume Ratio was updated on October 14, 2026 and Schlummer on October 14, 2026.

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