Sleep Timer vs Caffeine Mate
Price, ratings, monetisation and update history for both apps, side by side ā with what reviewers say about each.
Sleep Timer
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Sleep Timer is a transparent, science-based app designed for comfortable sleep and gentle waking. Built for people who need a clean and reliable sleep tool: - Free app - No subscriptions - No ads - No account registration - No data collection - Works entirely offline SLEEP TIMER & FALLING ASLEEP Smooth audio fade-out, smart screen dimming, and haptic feedback help you fall asleep quickly and naturally: - Precise fade-out duration (audio gradually fades to zero without jolting you awake). - Haptic pattern support (e.g., an "Inhale/Exhale" rhythm to help slow your heart rate). - Automatic playback stop to save battery life. GENTLE WAKE-UP (ALARM) Forget harsh and startling alarms. Sleep Timer wakes you up as comfortably as possible: - First ā a gradually increasing vibration (from rare pulses to frequent ones). - Then ā your chosen ambient sound, with volume rising from 0% to 100% over a custom duration. - Works independently of the sleep timer (you can set both night and morning modes simultaneously). MASSIVE LIBRARY & MIXES Create your perfect acoustic environment. Combine up to 3 sounds into your ideal mix with individual volume controls: - Classic noises (white, brown, radio static). - Nature sounds (rain on a tent, ocean waves, forest, melting snow, night crickets). - Cozy home textures (fireplace, fan, cat purring, brewing coffee). - City and travel (train rhythm, night city noise, airplane cabin). FULL-SCREEN BACKGROUNDS & COLOR THERAPY Your phone turns into a window overlooking the rain or the night sky: - Full-screen live backgrounds that won't blind you in the dark (Dunes, Night Sea, Starry Sky). - Warm color filters to block blue light. - Customizable smooth screen dimming synchronized with the audio fade-out. SCENARIOS & SCIENTIFIC APPROACH - Save your favorite timer and sound combinations for a quick start. - Use built-in, research-based presets (e.g., "Resonance Breathing" to lower heart rate variability, or a 25-minute "Power Nap" to avoid sleep inertia). PRIVACY BY DESIGN All your settings, mixes, and scenarios are stored exclusively locally on your device. Sleep Timer does not send audio data to a server, has no built-in trackers, and does not share information with third parties. IMPORTANT Sleep Timer is a tool for relaxation and acoustic environment control. The app is not a medical device. If you suffer from chronic insomnia, sleep apnea, or other serious sleep disorders, please consult a doctor.
Caffeine Mate
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Can I have another coffee before bed? Log your drinks with Caffeine Mate, then check your estimated caffeine now and at bedtime. Preview your next coffee, tea, matcha, or energy drink before you add it to your day. TRACK YOUR DRINKS ⢠Log coffee, espresso, tea, matcha, energy drinks, or a custom caffeine amount ⢠Find familiar drinks, save favorites, and reuse recent entries ⢠Review and edit your drink history ⢠Log from iPhone, Apple Watch, or an interactive widget PLAN YOUR NEXT CUP ⢠See your modeled caffeine estimate now and at your chosen bedtime ⢠Compare your bedtime estimate with the target you set ⢠Preview how another familiar drink would change that estimate ⢠Adjust your processing settings, bedtime, and target ⢠Follow the caffeine curve and inspect the formula behind the estimate The forecast uses your drink log and settings. It works without connecting sleep data. LEARN FROM YOUR ACTUAL SLEEP WITH CAFFEINE PRO Connect Apple Health sleep data or record your sleep manually. Caffeine Pro helps you review how your drink timing and actual sleep line up over time. ⢠Review each night's saved bedtime, actual sleep, and estimated caffeine ⢠Correct sleep entries and reversibly exclude nights from your patterns ⢠Explore private patterns as sufficient reviewed history becomes available ⢠Receive a conservative bedtime target and finish-by window when the evidence supports them ⢠Try a guided earlier-cutoff experiment and review what happened Collecting nights is the start. Recommendations depend on the amount and quality of your history. Pro does not promise a personal answer after a fixed number of nights. YOUR HISTORY STAYS ON YOUR DEVICES Use Caffeine Mate without an account. Your caffeine history, settings, and optional Pro sleep data stay on your devices. Apple Health access is optional and controlled by you. Estimates and observed patterns are for planning. They are not body measurements or medical advice. Sleep patterns do not establish cause and effect, and individual caffeine response varies. Download for free, then choose Caffeine Pro Lifetime or Annual after your personal onboarding preview. Lifetime is a one-time purchase with Family Sharing. Annual includes a 7-day free trial for eligible Apple accounts, then renews automatically each year unless cancelled. Pro unlocks continued tracking, live forecasts, sleep insights, Apple Health syncing, Apple Watch, and widget logging. Your saved history and data export remain accessible without an active plan. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: Sleep Timer at none against Caffeine Mate's 4. Caffeine Mate's advantage is update cadence (every 6 days vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.
Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS
Both are free to download. Caffeine Mate sells 4 in-app purchases, starting at $5.99 per year. Sleep Timer asks for nothing beyond the download.
Sleep Timer ships an update every 2 months, Caffeine Mate every 6 days. Both last shipped on October 25, 2026.
| Parameter | Sleep Timer | Caffeine Mate |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 6 days ā better |
| Ads | No | No |
| In-app purchases | No ā better | Yes |
| Devices | iPhone | iPhone, Apple Watch ā better |
| Requires iOS | 17.6 | 17.0 ā better |
| Further details ā not scored | ||
| Size | 37 MB | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | Xeniya Bykhova | Nicholas Wong |
In-app purchases
Sleep Timer
No in-app purchases
Caffeine Mate
- Caffeine Pro Annual7 Days trial$5.991 Year
- Caffeine Pro Monthly$5.991 Month
- Caffeine Pro Lifetime$9.99
- Caffeine Pro Lifetime$14.99
Questions
Is Sleep Timer free?
Is Caffeine Mate free?
Do Sleep Timer or Caffeine Mate have ads?
Which is updated more often, Sleep Timer or Caffeine Mate?
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