CRIS: Cannabis Grow Journal
Strains, Clones & Nutrients
Only for iPhone
Free · In-App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Your grow journal with no account and no server: strains, clones, nutrients, climate and costs – everything stays on your iPhone.
CRIS is more than a grow journal. It combines strain planning, clone management and real data analysis into one tool that follows your grow from seed to harvest – stored locally on your device, with no account and no server. Built for adult home growers who want to understand their grow, not just log it.
STRAIN LIBRARY & MATCHING
• Keep every strain with breeder, type, indica/sativa, flowering time and height
• Track your seed stock and average cost per seed, purchases recorded as lots
• Matching tool: set your limits (flowering time, height) and CRIS rates every strain with a traffic light – the best fit for your tent rises to the top
CLONES & MOTHER PLANTS
• Bought clones tracked as lots, with stock and cost per cutting
• Take your own cuttings straight from a mother plant – with counts for cut and rooted, and the cost carried over from the mother automatically
• Rooting rate and cost per clone at a glance
GROW WITH REAL DATA
• pH and EC trends for both feed water and runoff, week by week
• Climate values: temperature, humidity, PPFD, VPD and CO₂
• Strain history: yield, efficiency and issues per strain, evaluated across all your grows
KNOW WHAT A GRAM COSTS
• Electricity (kWh × price), nutrients (ml × cost/L), substrate, seeds and clones, hardware depreciation – added up automatically into total cost and cost per gram
• See exactly where your money goes and what home growing really costs you
DAILY GROW DIARY
• Watering, feeding, climate, training, photos and notes – all in one place
• Feeding schedules by week (ml/L or absolute doses); adjust a single week at any time without changing the template
• Phases from germination to harvest, cover photo and weekly history per grow
BUILT-IN CALCULATORS
VPD, PPFD to DLI, lux to PPFD, mixing pH and EC, DWC, yield and electricity cost – all offline, no connection needed.
PRIVACY FIRST
CRIS keeps everything on your device. No account, no tracking, nothing sent to a server. Your grow data belongs to you. Lock the app with Face ID if you like. You create backups yourself – a single file you share and store wherever you like, including your own cloud. Free for everyone.
CRIS PRO
Free covers a full first grow: 1 active grow, 5 strains and clones.
CRIS Pro grows with you:
• Unlimited simultaneous grows, strains, clones and feeding schedules
• Unlimited photos per diary entry
• Unlimited grow areas and your own target tables
• Reminder for each new plant week
• Monthly or yearly subscription – cancel anytime
LEGAL NOTICE
CRIS is intended solely for adults in countries where private cannabis cultivation is permitted. It is a record-keeping and management tool – no sales, no marketplace, no sourcing information.
SUBSCRIPTION INFO
Payment is charged to your Apple Account. The subscription renews automatically unless cancelled at least 24 hours before the end of the current period. You can manage or cancel it at any time in your Apple Account settings.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://www.cris-app.com/datenschutz.php?lang=en
Made by a grower, for growers.
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
– New: CRIS in Polish
– 8 more currencies: HUF, RON, ISK, ALL, BAM, MKD, MDL, RSD
The developer, Christoph Zimmermann, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Purchases
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Size
- 19.4 MB
- Category
- Lifestyle
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
English and 7 more
- English, Czech, Dutch, French, German, Italian, Polish, Spanish
- Age Rating
18+
- 18+
- Frequent
Alcohol, Tobacco, Drug Use or References
- In-App Purchases
Yes
- CRIS Pro Yearly 199,00 kr
- CRIS Pro Monthly 39,00 kr
- Provider
Christoph Zimmermann
- Christoph Zimmermann has identified itself as a trader for this app and confirmed that this product or service complies with European Union law.
- Address
Europaring 90
c/o Online-Impressum #9783
53757 Sankt Augustin
Germany - Phone Number
+49 16092030675 - Email
zemantix.studio@gmail.com
- Copyright
- © 2026 Christoph Zimmermann