Comparison

Scientific Timer vs Calpaper

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

Head to head
About

Scientific Timer

Features
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Scientific Timer helps researchers keep complex experiments on schedule. It breaks multi-step protocols into timer-tasks, so every incubation, wash and spin gets its own timer, in order, and you always know what comes next. Tired of juggling kitchen timers across the bench, or losing track of which tube went in the centrifuge when? Start from a curated protocol or build your own, then run as many timer-tasks in parallel as your experiments need. FEATURES PROTOCOLS AS TIMER-TASKS Each step of a protocol becomes a timer-task with its name, duration and position. Start, pause and reset each one on its own, and see its progress at a glance. CURATED PROTOCOLS, READY TO RUN 12 protocols with 211 timer-tasks, already set up: 10x Chromium Single Cell 3' Gene Expression v4 and 5' Gene Expression v3, 10x Xenium In Situ Gene Expression, ScaleBio Single Cell RNA Sequencing v1.1, Twist Library Preparation EF 2.0, Beckman Coulter SPRIselect left-side and double-sided size selection, Qiagen QIAamp DNA Micro, Qiagen RNeasy Midi/Maxi, NEB Ligation, immunofluorescence on frozen sections and trypsinization. Choose the ones you use when you first open the app, and change your selection later in Settings. YOUR OWN PROTOCOLS Create protocols and timer-tasks of your own, up to 24 hours each, as a countdown timer or a stopwatch. Put steps in the order you run them and mark your favorites. RUN MANY AT ONCE Run as many timer-tasks in parallel as you need, across several protocols. Timers keep counting while the app is closed, and a timer that passes its target keeps going, shown with a "+", so you know exactly how far over it is. QUIET NOTIFICATIONS A subtle notification on your iPhone tells you when a timer-task is done, instead of another alarm ringing across the lab. SEARCH Find a protocol by name in your library, or a timer-task by name within a protocol. BACK UP AND SHARE Export the protocols you created to a file, and import them again on another iPhone or share them with your lab. ACCESSIBLE TO EVERYONE Works with VoiceOver and Voice Control, adapts to the largest text sizes, supports Dark Mode, respects Reduce Motion, and does not rely on colour alone. PRIVATE BY DESIGN Scientific Timer collects no data. No account, no sign-in, no analytics, no tracking, no third-party SDKs. Your protocols and timers stay on your iPhone. LANGUAGES The app and its curated protocols in English, French, Spanish and Simplified Chinese. REQUIREMENTS iPhone with iOS 18 or later. Privacy Policy: https://elyzeo.com/apps/scientific-timer/privacy.html

About

Calpaper

Transform your lock screen into a dynamic calendar. Display today's events, reminders, countdowns, notes, and photos. Customize colors, fonts, and layouts to stay organized at a glance.

Highlights
  • Lock screen calendar display
  • Event and reminder integration
  • Countdown timers
  • Customizable notes and photos
  • Multiple color themes
  • Design saving and switching
Features
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A Lock Screen calendar that redraws itself every morning. Calpaper turns today's schedule into your Lock Screen wallpaper: today's events, your open reminders, a note or a list, countdowns to the dates you're waiting for, this month or this week at a glance, and a photo you love. Your day is there before you unlock. WHAT YOU CAN PUT ON IT • Today's events from the calendars on your iPhone (iCloud, Google, Outlook), as a list or a timeline. Once today's are done, tomorrow's. • Your Reminders lists, what's due today first, as many as fit. Tick one off and it's gone at the next update. • Countdowns to the dates you're waiting for, a step closer every morning, and days since a date that matters. One of each is free; more come with Calpaper Pro. • A note to yourself or a list, one item a line, like your groceries, and a photo card. • This month with today marked, or this week in one short row with the number of events each day, on its own or over the month (Calpaper Pro). • Your name and a few emoji between the flashlight and the camera (Calpaper Pro). MAKE IT YOURS • Ten calm colors. With Calpaper Pro: gradients, your own photos (a new one every morning if you like), three more typefaces, emoji, and cards that are transparent, frosted or a color of your own. • Save the looks you make as designs and switch between them in one tap, or start from a ready-made one: an agenda, a planner, a grocery list, a to-do list. One design is free; Calpaper Pro keeps as many as you like. • Reorder or hide any block, and use larger text if you need it. Try every Pro feature on the preview first. QUESTIONS PEOPLE ASK How do I put my calendar on my iPhone Lock Screen? Install Calpaper, allow access to your calendars and add the ready-made shortcut the app offers. Calpaper draws today's events into a wallpaper and Apple's Shortcuts app sets it on your Lock Screen. The guide shows every tap and takes a few minutes. Does the wallpaper update by itself every day? Yes. A daily automation in Shortcuts makes a fresh wallpaper every morning at the time you choose. Changed something? Tap Update in the app, or long-press its icon. Can I see a countdown on my Lock Screen? Yes. Add the dates you're waiting for, like a trip or a birthday, and each shows the days left on a track that moves a step closer every morning. Can I put my grocery list on my Lock Screen? Yes. Type it in the note, one item a line, or show your Reminders lists. Both grow into the room the other blocks leave. Does it work with Google Calendar or Outlook? Yes. Calpaper shows any calendar on your iPhone, Google, Outlook, iCloud and shared calendars included, and you choose which ones. Is it a widget? No. Calpaper changes the wallpaper itself, so your day fills the Lock Screen, with either Lock Screen clock and next to your widgets. Is my calendar private? Yes. Everything is read and drawn on your iPhone. Your events, notes and photos never leave it, and there's no account. Free to download, with the daily wallpaper included. Calpaper Pro is one purchase: no subscription, no ads, no account. Works with VoiceOver, Dynamic Type and Reduce Motion. Available in English, Spanish, Portuguese, German, French, Italian, Japanese, Korean, Traditional Chinese, Simplified Chinese and Turkish.

Screenshots

Scientific Timer4 screens
Calpaper4 screens

Verdict

The call

The clearest difference is price: Calpaper at Free against Scientific Timer's $0.99. Calpaper also leads on update cadence (daily vs every 16 months). Scientific Timer's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement 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

Calpaper is free to download; Scientific Timer costs $0.99 up front. Calpaper sells 1 one-off in-app purchase. Scientific Timer asks for nothing beyond the download.

UpkeepUpdate frequency

Scientific Timer ships an update every 16 months, Calpaper daily. Both last shipped on November 8, 2026.

Scorecard3 real differences · 7 level
Scientific Timer versus Calpaper: the parameters behind the verdict, then further details
ParameterScientific TimerCalpaper
Price$0.99Free — better
Rating—4.0 (4 ratings) — better
Positive reviews—83.3% of reviews
Number of ratings—4 — better
Update frequencyEvery 16 monthsDaily — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhoneiPhone
Requires iOS18.018.0
Further details — not scored
Size8 MB23 MB
Age rating4+4+
DeveloperStephane BoutetDaniel Garcia

In-app purchases

None

Scientific Timer

No in-app purchases

1 purchases

Calpaper

One-time1
  • Calpaper Pro$6.99

Questions

Is Scientific Timer free?
Scientific Timer costs $0.99, with no in-app purchases.
Is Calpaper free?
Calpaper is free to download, with in-app purchases available.
Do Scientific Timer or Calpaper have ads?
Neither Scientific Timer nor Calpaper shows ads.
Which is updated more often, Scientific Timer or Calpaper?
Scientific Timer ships an update every 16 months, and Calpaper daily. Most recently, Scientific Timer was updated on November 8, 2026 and Calpaper on November 8, 2026.

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