Leps by Fieldguide vs Nature's Notebook
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Leps by Fieldguide
This app helps identify moths and butterflies from photos, records your observations, and connects you with other enthusiasts. It builds a dynamic checklist of your findings and allows you to share your collection data with the community.
- Photo-based species identification
- Automatic observation checklist updates
- Collection data sharing
- Connect with other enthusiasts
- Publish photos online
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Fieldguide.ai is to the pocket field guide, what Wikipedia is to the encyclopedia—a crowd-sourced compendium of all natural and cultural things. "Leps" is Fieldguide's dedicated ID assistant and community for lep lovers (Lepidoptera: moths & butterflies). Use Leps to: Identify species ~ Leps analyzes your moth/butterfly photos to suggest possible IDs that can be later verified by the Fieldguide community. Record your observations ~ Leps arranges your observations into a dynamic checklist. When taxonomic treatments change, your records update automatically. Showcase your collection ~ Sharing collection data builds a richer picture of Lepidoptera morphology, phenology, and distribution. Connect with enthusiasts ~ Follow people who share your curiosity and interests. You can also publish your lep photos on the web: https://leps.fieldguide.ai
Nature's Notebook
Record observations of plant and animal life cycles, such as flowering and migration. Mark observation sites, create species lists, and log seasonal changes in nature.
- Record plant and animal life cycle events
- Mark observation sites
- Create species lists
- Log seasonal observations
- Citizen science program
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Nature's Notebook is a program for observing and recording plant and animal life cycle events, like flowering and bird migration. Use this app to mark your sites, create a list of plants and animals, and going into the field to record observations throughout the seasons. Find out more at www.usanpn.org/nn/guidelines.
Screenshots
Verdict
The clearest difference is rating: Leps by Fieldguide at 4.3 against Nature's Notebook's 3.1. Leps by Fieldguide also leads on review sentiment (82% vs 40%) and iOS requirement (9.0 vs 12.0). On price, ratings volume, update cadence and ads 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. Neither carries in-app purchases, so what you see is what you pay.
Leps by Fieldguide holds the better App Store score, 4.3 against 3.1. Both are backed by a comparable volume of ratings — 23 and 26 respectively. Written reviews point the same way: 82% of Leps by Fieldguide's written reviews are positive against 40% of Nature's Notebook's.
Leps by Fieldguide ships an update every 4 weeks, Nature's Notebook every 3 weeks. Both last shipped on October 17, 2026.
| Parameter | Leps by Fieldguide | Nature's Notebook |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (23 ratings) — better | 3.1 (26 ratings) |
| Positive reviews | 82.4% of reviews — better | 40.0% of reviews |
| Number of ratings | 23 | 26 — better |
| Update frequency | Every 4 weeks | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 9.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 62 MB | 47 MB |
| Age rating | 4+ | 4+ |
| Developer | Change Theory Corp | National Phenology Network |
Customer experience
Leps by Fieldguide
Nature's Notebook
In-app purchases
Leps by Fieldguide
No in-app purchases
Nature's Notebook
No in-app purchases
Questions
Is Leps by Fieldguide free?
Is Nature's Notebook free?
Which has better reviews, Leps by Fieldguide or Nature's Notebook?
Do Leps by Fieldguide or Nature's Notebook have ads?
Which is updated more often, Leps by Fieldguide or Nature's Notebook?
Other comparisons
