SLIT Support vs Petal
Price, ratings, monetisation and update history for both apps, side by side â with what reviewers say about each.
SLIT Support
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SLIT Support is a daily dose logging, timer, and reminder app for people continuing sublingual immunotherapy (SLIT). With one-tap dose logs, 1- and 5-minute timers, daily reminders, symptom notes, and calendar review, you can keep your SLIT routine organized in one place. This app is designed to help people continuing sublingual immunotherapy for cedar pollen allergy, dust mite allergy, and other allergy treatments reduce missed doses and review daily dose records and condition changes. What you can do: - Log your daily dose with one tap - Use 1- and 5-minute timers with completion notifications - Set daily dose reminders - Record symptoms, condition, and notes - Review dose days and records on a calendar - Check your current streak and total recorded days Premium Plan: - Separate dose records for dust mite and cedar pollen treatment - Monthly reports for past dose records and symptoms - Day-of-week reminder settings - Extended note limits - Ad removal - Theme color, dark mode, and other customization options Recommended for people who: - Are starting sublingual immunotherapy and want to build a daily routine - Want to manage the 1- or 5-minute waiting time after each dose - Want to reduce missed doses - Want to review dose records and condition changes on a calendar - Want to keep track of SLIT for cedar pollen allergy or dust mite allergy This app does not replace medical advice, diagnosis, or treatment. If you have any questions about your medication or condition, please consult your doctor, pharmacist, or another qualified healthcare professional.
Petal
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Was it last night's poor sleep? Pollen? Sweat? Petal is a skin diary that helps you spot what tends to trigger your eczema and sensitive-skin flare-ups. Log your skin in about a minute a day, mostly with taps. THREE PROMISES - Free to start. No subscription (Premium is a one-time payment) - No third-party ads - Your logs and photos are stored only on your device KEY FEATURES - Rate your skin each day on a 10-point scale - Tap to log symptoms like itching, redness and dryness, and where they appear - Record weather, sleep, stress, food and possible triggers (sweat, pollen, detergent and more) - Add and reorder your own options - Save photos with each entry and compare the same area side by side over time - See good and bad days at a glance on a calendar - Charts show how your score changes and how it relates to sleep and triggers - See how yesterday shows up on today's skin, and which combinations of triggers tend to make things worse - Compare your score before and after starting a new skincare product or supplement - A monthly summary of your average score, most common symptoms, areas and triggers - Log creams and moisturizers per medication and time of day (by body area with Premium) - "Itch right now": a 10-second log for the middle of the night - Doctor visit summary: one PDF page with the period, symptom and medication days, your notes and photos, to share or print - Camera guide that overlays your last photo so you can shoot the same framing - Day counters: "Day 12 on the new moisturizer", "next injection in 3 days" - Add hay fever symptoms, period and meal notes to entries, only if you want them - Air pressure from your iPhone's barometer is saved with each entry (no network); season is added automatically - A checklist for your daily skincare and medication routine - Daily reminders (local notifications on your device) GREAT FOR - People with atopic dermatitis or sensitive skin that comes and goes in cycles - Anyone who wants to learn their own flare-up patterns - Showing your doctor recent scores and photos at your next appointment (the summary is made for exactly that) - Checking whether a new skincare routine is working for you - Anyone who found a paper journal hard to keep up PRIVACY - Your entries and photos are stored only on your device - No account needed. Your entries and photos are never sent to a server - To show "More Apps" from the developer, Petal may load public App Store information (app names and icons). Your entries and photos are not sent when this happens
Screenshots
Verdict
The clearest difference is ads: Petal at none against SLIT Support's shown. SLIT Support's advantage is update cadence (weekly vs monthly) and iOS requirement (15.0 vs 17.0). On price, in-app purchases and device support 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
Both are free to download. SLIT Support sells 2 in-app purchases, starting at $2.99 per month and Petal sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
SLIT Support ships an update weekly, Petal monthly. The most recent releases landed on November 8, 2026 and October 31, 2026 respectively.
| Parameter | SLIT Support | Petal |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly â better | Monthly |
| Ads | Yes | No â better |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.0 â better | 17.0 |
| Further details â not scored | ||
| Size | 93 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Kenta Fukushima | torankirite |
In-app purchases
SLIT Support
- Premium Plan (1 Month)14 Days trial$2.991 Month
- Premium Plan (1 Year)14 Days trial$24.991 Year
Petal
- Petal Premium$4.99
Questions
Is SLIT Support free?
Is Petal free?
Do SLIT Support or Petal have ads?
Which is updated more often, SLIT Support or Petal?
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